How many sovereign countries in Africa are UN member states? Answer with the whole number only.

Airport code ORD belongs to the main international airport of which US city? Answer with the city name only.

In what year did Valentina Tereshkova fly in space? Answer with the four-digit year only.

How many states does Brazil have, not counting the Federal District? Answer with the whole number only.

In what year was Richard Feynman awarded the Nobel Prize in Physics? Answer with the four-digit year only.

What is the capital of Bulgaria? Answer with the city name only.

How many countries share a land border with Brazil? Answer with the whole number only.

Which university's online COVID-19 dashboard became a widely cited global case tracker? Answer with the university name without 'University', e.g. 'Johns Hopkins'.

In what month of 2020 did Donald Trump announce he had tested positive for COVID-19? Answer with the month number (1-12) only.

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

On which day of the week did the UK's 'Clap for our Carers' take place? Answer with the day name only.

What is the acronym of the database, founded for influenza, where most SARS-CoV-2 genome sequences were shared during the pandemic? Answer with the acronym only, in capital letters.

The price of the front-month WTI crude oil futures contract settled below zero in April 2020. Answer true or false.

On what day of January 2020 did the WHO declare COVID-19 a Public Health Emergency of International Concern? Answer with the day of the month as a whole number only.

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.

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

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.

Which Imperial College epidemiologist led the March 2020 model that shaped UK lockdown policy? Answer with the surname only.

Which country won the 2021 Copa America, held in Brazil after being moved during the pandemic? Answer with the country 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.

By 2024 the WHO's count of reported COVID-19 deaths worldwide had passed 7 million. Answer true or false.

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.

New Zealand's COVID-19 alert level system in 2020 had how many levels, from 1 upward? Answer with the whole number only.