Hong Kong researchers will comb through a collection containing more than 6,000 animal samples in an effort to uncover the source of Covid-19 under a recently approved measure setting aside HK$100 million (US$12.9 million) in public funding for coronavirus-related studies. The grants will also go towards research into potential new treatments for Covid-19, the transmissibility of the virus’ major variants and the effectiveness of administering third doses of the BioNTech and Sinovac vaccines. More than 18 months into the pandemic, researchers from around the world still have not definitively traced the origins of the coronavirus. Do you have questions about the biggest topics and trends from around the world? Get the answers with SCMP Knowledge, our new platform of curated content with explainers, FAQs, analyses and infographics brought to you by our award-winning team.