In what year did China abandon its zero-COVID policy? Answer with the four-digit year only.

Which country developed the Abdala COVID-19 vaccine? Answer with the country name only.

Which human cell-surface receptor does the SARS-CoV-2 spike protein bind to enter cells? Answer with the receptor's abbreviation only.

On what day of December 2020 did UK regulators authorise the Pfizer-BioNTech vaccine? Answer with the day of the month as a whole number 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.

The CDC advised hand sanitiser with at least what percent alcohol? Answer with the whole number only.

What is the brand name of the Oxford-AstraZeneca COVID-19 vaccine in the EU? Answer with the name only.

What was the name of the emergency hospital in Wuhan built in about ten days and opened in early February 2020 (the 'Fire God Mountain' hospital)? Answer with the one-word name before 'Hospital' only.

In what year was Moderna founded? Answer with the four-digit year only.

The name 'coronavirus' comes from a Latin word meaning what? Answer with one English word only, in lowercase.

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.

Queen Elizabeth II sat alone at Prince Philip's funeral in April 2021 because of COVID-19 rules. Answer true or false.

In what year did India's Delta-driven second COVID-19 wave peak? Answer with the four-digit year only.

What is the Pango lineage designation of the Alpha variant? Answer with the lineage code only, e.g. 'A.1.2'.

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.

Who was Prime Minister of New Zealand during its 2020 elimination strategy? Answer with the surname only.

The Johnson & Johnson (Janssen) COVID-19 vaccine was an mRNA vaccine. Answer true or false.

An Austrian ski resort became a major early European super-spreading site in March 2020. Answer with the resort's name only.

Of which US institute was Anthony Fauci director? Answer with the institute's abbreviation only.

Who was the chief scientific adviser of Operation Warp Speed? Answer with the surname only.

What is the common name of the compound with the formula NaCl? Answer with the two-word common name only, in lowercase.

Who discovered radioactivity in uranium in 1896? Answer with the surname only.

Earth's outer core is solid. Answer true or false.