What was the primary focus of the study conducted by the Centers for Disease Control and Prevention in Singapore?
Asymptomatic people also responsible for virus spread

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Science, Health Sciences, Social Studies, Biology
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11th Grade - University
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The effectiveness of vaccines
Pre-symptomatic transmission of COVID-19
The role of masks in preventing infection
The impact of lockdown measures
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many clusters of cases were identified in the study that showed possible pre-symptomatic transmission?
12 clusters
5 clusters
7 clusters
10 clusters
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the study, how many cases were determined to be due to pre-symptomatic transmission?
7 cases
5 cases
10 cases
15 cases
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Where did the man in cluster E travel to, where he may have been infected?
Thailand
South Korea
China
Japan
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What activity did patient B1 participate in that likely led to the transmission of the virus to patient B2?
Attending a concert
Going to a restaurant
Participating in singing classes
Visiting a shopping mall
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