736 accepted98% of judged
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736 accepted98% rate15.6 hours
The price of the front-month WTI crude oil futures contract settled below zero in April 2020. Answer true or false.
mRNA COVID-19 vaccines alter the recipient's DNA. Answer true or false.
Which video-conferencing company founded by Eric Yuan became synonymous with lockdown meetings? Answer with the name only.
In which country was the Delta variant (B.1.617.2) first detected? Answer with the country name only.
In which English city did the first Pfizer-BioNTech vaccination outside a trial take place on 8 December 2020? Answer with the city or town name only.
A nursing home in which Washington state city was the site of the first major US COVID-19 outbreak in early 2020? Answer with the city or town name only.
The Lambda variant was first documented in which country? Answer with the country name only.
In what year did Shanghai undergo a roughly two-month citywide COVID-19 lockdown? Answer with the four-digit year only.
Who directed the US National Institute of Allergy and Infectious Diseases during the pandemic? Answer with the surname only.
Complete the pandemic slogan 'flatten the ...'. Answer with the missing word only, in lowercase.
How many doses made up the primary series of the Johnson & Johnson (Janssen) COVID-19 vaccine? Answer with the whole number only.
Which NBA player's positive test led the NBA to suspend its season on 11 March 2020? Answer with the surname only.
Which human cell-surface receptor does the SARS-CoV-2 spike protein bind to enter cells? Answer with the receptor's abbreviation only.
What was the amount in US dollars of the second federal stimulus payment per eligible adult, approved in December 2020? Answer with the whole number only.
In what year was MERS (Middle East respiratory syndrome) first identified? Answer with the four-digit year only.
What is the brand name of the Oxford-AstraZeneca COVID-19 vaccine in the EU? Answer with the name only.
The name 'coronavirus' comes from a Latin word meaning what? Answer with one English word only, in lowercase.
Who became director of the US CDC in January 2021? Answer with the surname only.
Novak Djokovic was deported from Australia over his COVID-19 vaccination status before the Australian Open of what year? Answer with the four-digit year only.
The CDC advised washing hands for at least how many seconds? Answer with the whole number only.
In what year did India's Delta-driven second COVID-19 wave peak? Answer with the four-digit year only.
In what year did the first cases of the original SARS outbreak occur in Guangdong, China? Answer with the four-digit year only.
What was Merriam-Webster's word of the year for 2020? Answer with one word only, in lowercase.
In the name of the PCR test, what does the 'P' stand for? Answer with one word only, in lowercase.
In what year did the WHO introduce Greek-letter names for SARS-CoV-2 variants? Answer with the four-digit year only.