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How to catch Covid19

How to actually catch Covid-19? By now we know: most people got infected in their own home. One household member contracted the Coronavirus somewhere outside and brought it home where sustained contact between household members did lead to infections. But where are people contracting the infection in the first place?

People are worrying about grocery stores, bike rides, inconsiderate runners, folks who are not wearing masks … is all this the major concern? Well, not really. Let’s explain.

The infectious dose

In order to get infected you need to get exposed to a certain infectious dose of the virus. Based on infectious dose studies with other coronaviruses, it appears that small doses may be needed for an infection to take hold in your body. Some experts estimate that as few as 1,000 infectious particles are all it needs. Infection with 1,000 particles could occur in just one eye-rub or one breath, containing these 1,000 particles. Or 100 infectious particles are inhaled with each breath over 10 breaths, or 10 particles are inhaled with 100 breaths. Each of these situations can lead to an infection.

How much Covid19 is released into the environment?

1: Bathroom | Bathrooms have a lot of high touch surfaces, door handles, faucets, stall doors. Transfer risk in this environment can be high. Toilet flushing does aerosolize many droplets.

2: Cough | A single cough releases approx. 3,000 droplets. Most droplets are large, and fall to the ground quickly, but many smaller droplets stay in the air and travel across a room.

3: Sneeze | A single sneeze releases about 30,000 droplets. Most droplets from Sneezing are small and travel great distances. If a person is infected, the droplets in a single cough or sneeze may contain as many as 200,000,000 Covid19 particles which can all be dispersed into the environment around them.

4: Breath | A single breath releases 50 to 5,000 droplets. Most of these droplets are low velocity and fall to the ground quickly. There are even fewer droplets released through nose-breathing. Importantly, due to the lack of exhalation force with a breath, viral particles from the lower respiratory areas are not expelled.
Unlike sneezing and coughing which release huge amounts of viral material, the respiratory droplets released from breathing only contain low levels of virus. We don’t have a number for Covid19 yet, but we can use Influenza as a guide. Studies have shown that a person infected with Influenza releases up to 33 infectious viral particles per minute. 

Let’s imagine, you are already infected, but you don’t know it yet. Anyone you spend greater than 10 minutes with in a face-to-face situation is potentially infected. Anyone who shares a space with you (office, mosque, school, home) for an extended period is potentially infected. This is why it is critical for people who are symptomatic to stay home. Your sneezes and your coughs expel so much virus that you can infect a whole room of people.

As we move back to work, or go to a restaurant, let’s look at what can happen in those environments.

Restaurants

Some really great shoe-leather epidemiology demonstrated clearly the effect of a single asymptomatic carrier in a restaurant environment (see infographic). The infected person at seat A1 sat at a table and had dinner with nine friends. Dinner took about 1 to 1.5 hours. During this meal, the virus carrier released low-levels of virus into the air from breathing. Airflow (from the restaurant’s various airflow vents) was from right to left. Approximately 50% of the people at the infected person’s table became sick over the next seven days. In addition, 75% of the people on the adjacent downwind table became infected. And even two of the seven people on the upwind table were infected (believed to happen by turbulent airflow). No one at tables E or F became infected, they were out of the main airflow from the air conditioner on the right to the exhaust fan on the left of the room.

Workplaces

Another great example is the outbreak in a call center in South Korea. A single infected employee came to work on the 11th floor of a building in Seoul. That floor had 216 employees. Over the period of a week, 94 of those people became infected (43.5%: the blue chairs). 92 of those 94 people became sick (only two remained asymptomatic). Notice how one side of the office is primarily infected, while there are very few people infected on the other side. While exact number of people infected by respiratory droplets / respiratory exposure versus fomite transmission (door handles, shared water coolers, elevator buttons etc.) is unknown. It serves to highlight that being in an enclosed space, sharing the same air for a prolonged period increases your chances of exposure and infection. Another three people on other floors of the building were infected, but the authors were not able to trace the infection to the primary cluster on the 11th floor. Interestingly, even though there were considerable interaction between workers on different floors of the building in elevators and the lobby, the outbreak was mostly limited to a single floor. This highlights the importance of exposure and time in the spreading of Covid19.

Choir

The community choir in Washington State, USA. Even though people were aware of the virus and took steps to minimize transfer; e.g. they avoided the usual handshakes and hugs hello, people also brought their own music to avoid sharing, and socially distanced themselves during practice. They even went to the lengths to tell choir members prior to practice that anyone experiencing symptoms should stay home. A single asymptomatic carrier infected most of the people in attendance. The choir sang for 2 1/2 hours, inside an enclosed rehearsal hall which was roughly the size of a volleyball court.
Singing, to a greater degree than talking, aerosolizes respiratory droplets extraordinarily well. Deep-breathing while singing facilitated those respiratory droplets getting deep into the lungs. Two and half hours of exposure ensured that people were exposed to enough virus over a long enough period of time for infection to take place. Over a period of 4 days, 45 of the 60 choir members developed symptoms, 2 died. The youngest infected was 31, but they averaged 67 years old.

Indoor sports

A super spreading event occurred during a curling event in Canada. The curling event with 72 attendees became another hotspot for transmission. Curling brings contestants and teammates in close contact in a cool indoor environment, with heavy breathing for an extended period. This tournament resulted in 24 of the 72 people becoming infected.

Social Gatherings

Just to see how simple infection-chains can be, this is a real story from Chicago, USA. Only the name used here is fake.

Bob was infected but didn’t know. Bob shared a takeout meal, served from common serving dishes, with two family members. The dinner lasted three hours. The next day, Bob attended a funeral, hugging family members and others in attendance to express condolences. Within four days, both family members who shared the meal are sick. A third family member, who hugged Bob at the funeral became sick. But Bob wasn’t done. Bob attended a birthday party with nine other people. They hugged and shared food at the three hour party. Seven of those people became ill.
And Bob’s transmission chain still wasn’t done. Three of the people Bob infected at the birthday went to church. Members of that church became sick. In all, Bob was directly responsible for infecting 16 people between the ages of 5 and 86. Three died.

Indoor vs Outdoor

The spread of the virus within the household and back out into the community through funerals, birthdays, and religious gatherings is believed to be responsible for the broader transmission of COVID-19.
The reason to highlight these different outbreaks is to show you the commonality of outbreaks of COVID-19. All these infection events were indoors, with people closely-spaced, with lots of talking, singing, or yelling. The main sources for infection are home, workplace, public transport, gatherings, restaurants. This accounts for 90% of all transmission events.

In contrast, outbreaks spread from shopping appear to be responsible for a small percentage of traced infections. And only one single outbreak has been reported from an outdoor environment (= less than 0.3% of traced infections).

Source: https://www.weforum.org/agenda/2020/05/coronavirus-covid19-exposure-risk-catching-virus-germs


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What we do

Since the beginning of 2020, our Deep Clean Specialists have been focussing on Anti Covid-19 disinfection treatments in the Klang Valley. But we also never lost sight of our core business: Anti Dengue Fogging. Regardless of what our customers need. We will be available – 24/7 including weekends.

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Coronavirus Facts

Children back to School?

When should we send our children back to school?

There is no easy answer. Just recently, mass media reported on the numbers of Covid19 cases among children. Fact is: Although kids below the age of 12 don’t die from catching the Coronavirus, they can still fall sick.

Infected kids weren’t coughing. They didn’t have severe respiratory distress. Instead, they had sky-high inflammation, fever, rashes on their hands and feet, diarrhea, vomiting, and low blood pressure.

Not just in Malaysia but worldwide there have been plenty of Covid-19 cases detected among children. The good news: To date, there have been no death recorded among children under 12. The bad news. Children for sure act as spreaders of the Coronavirus. What to do? It is that simple: If our children are exposed to the coronavirus through kindergarden or school, they may not fall sick, but bring home the virus, and infect the adults.


Scenario 1:
You put the education of children at risk by keeping schools closed.

Scenario 2:
You take a risk with their safety and the safety of their parents, grandparents by re-opening schools.


The problem is that if we say to parents they must send their children back to school, and there is just one awful case involving a teacher or a pupil who contracts Covid-19, then it is all over the media.

Research carried out by a German team at the Charité hospital in Berlin found no significant difference between any age categories, including children. Viral loads in the very young do not differ significantly from those of adults. We have to caution against an unlimited re-opening of schools and kindergartens in the present situation. Children may be as infectious as adults.


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YogaOneThatIWant

Anti-viral disinfection at YogaOneThatIWant Studios | Last Friday, our Deep Clean Specialists have carried out a disinfection treatment to prevent the outbreak of Covid-19 at Atilia Haron’s YogaOneThatIWant Studios. For now, this Yoga studio still remains closed. But owner Atilia Haron ordered a deep cleaning to ensure the yoga studio is in clean and safe conditions once it re-opens. And looking at Malaysia’s declining numbers of Covid-19 cases, the re-opening might actually happen sooner than later 🙂

http://yogaonethatiwant.com/yogaone

Yoga is one of only a handful of sports that includes body and soul at the same time. There are many styles of yoga to be taught, with only one goal in mind: to bring your soul into a positive state and make your body healthier. Yoga can be very diverse. It usually starts with basic movements for beginners and reaches more complex exercises for advanced participants that require a lot of balance, muscle strength and flexibility.


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Coronavirus Facts

Funny Facemasks

The Coronavirus topic is quite a serious one. Still we can’t help to look at the bride side from time to time. From Stylish to Stupid, here are our top 10 Face masks …

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Anti-Covid19 Disinfection at Pusat Khidmat Rakyat Parlimen Bera

Anti-Covid19 Disinfection at Pusat Khidmat Rakyat Parlimen Bera on 14 May 2020 | Today’s assignment was accross the state border at the Bera Parliament people’s service center. Our Deep Clean Specialists teamed up with the Fire Brigade to get the job done. Goal: prevention of Covid-19 spread at the Center.

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10 Days of Disinfection …

Your shop lot is 2,000 sq ft and needs a daily anti-viral disinfection. Each day, a Deep Clean Specialist comes by and charges you RM0.30 per sq ft = RM600 per day. After doing this for 10 days you are most likely broke.

SOLUTION:

Book just one disinfection, and buy all the equipment from our Deep Clean Specialist at the end of the treatment.

ADVANTAGES:

1) You learn how to disinfect your premise on your own.
2) You get a certificate and even a video as proof of evidence.
3) You save a lot of money.

Don’t expend your limited resources in trying to make water flow uphill.

Geoffrey Howe, UK finance minister, 1979-83

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Coronavirus Facts

China goes back to School

Children in China are going back to school. To avoid a second wave of Coronavirus infections, a series of nationwide safety measures have been put in place by the Chinese Government. 

Before entering the school, each student needs to get the soles of the shoes disinfected, and needs to throw away the face mask he or she was wearing. Next the student washes hands thoroughly and stands in front of a misting machine that sprays disinfectant onto the school uniform. A no-touch thermometer takes the temperature. Only then the student can go inside. 

Source: Facebook

Once the kids pass through this filter, every school determines their own measures. Of course practicing social distancing among students is a must. Some schools have turned desks into personal cubicles by adding plexiglass walls while other schools favor big hats to keep students one meter away from each other. Many schools have opted to reduce the class sizes. Example: A class of 20 might now be split into two classes of 10. Where the weather allows it, classes are being held outside to practice social distancing. 

All schools had to install hand sanitizing stations, and students must wash their hand once per hour.  

Cafeterias are either limited to one person per table or completely closed. In this case, students eat in the classrooms.

Some schools have even designated special class rooms to students with fever or any signs of illness. 

The measures taken in China don’t guarantee a safe return to school. But combined, these efforts lower the risk of a re-emerging Coronavirus. They reflect the new reality that awaits us here in Malaysia as we try to combat new waves of the virus as good as we can. 


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Companies to resume business without approval

According to Miti, companies may now resume operations without an approval letter from the Ministry of International Trade and Industry. Covid-19 screening of workers is not mandatory. Miti announced that employers may use the SOSCO screening programme (https://prihatin.perkeso.gov.my). It is free for companies who are registered with SOSCO.

However, for foreign workers in the construction industry it is compulsory to undergo Covid-19 screening through the SOSCO screening programme. Treatment for registered local or foreign workers who have been infected with Covid-19 will have to be done at a government hospital with the medical cost borne by the government. Individuals who are found to have had contact with a Covid-19 patient will have to be quarantined under the movement control order.

“If a registered local or foreign worker is infected with Covid-19, treatment should be done at a government hospital and the medical cost will be borne by the government, including for foreigners if the diagnosis for Covid-19 is confirmed,” Miti told the media. “If a worker needs to be quarantined at a place other than a government hospital or his house, the cost of quarantine at the quarantine centre will have to be borne by the employer.

“Any other logistics costs outside the government hospital or government clinic will also have to be borne by the employer,” Miti said. “It is the collective responsibility of all quarters to understand and comply with all the current directives of the National Security Council (MKN) and also the SOP on the prevention of Covid-19 issued by the Ministry of Health. Together we can mitigate the risk and contain the spread of the Covid-19 pandemic.”

Malaysia is making significant progress in fighting Covid-19. Yesterday, the number of active cases did drop again ->

Virus vs Malaysia Statistics Active Cases May 7 2020

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