We all have a specialist interest in coronaviruses, with MP and SP involved in funded research on coronaviruses. AZ acknowledges support from the PANDORA-ID-NET (grant RIA2016E-1609) funded by the European and Developing Countries Clinical Trials Partnership (EDCTP2) under Horizon 2020, the EU's Framework Program for Research and Innovation; is in receipt of a National Institutes of Health Research senior investigator award, the Mahathir Science Award; is a EU-EDCTP Pascoal Mocumbi Prize Laureate; and is a member of Scientific Expert Committee of the EC-EDCTP-Global Health Program. SP is supported by grants paid to his institution from the US National Institutes of Health (NIH; RO1 AI129269) and is a member of the Vaccines and Related Biological Products Advisory Committee of the US Food and Drug Administration. MP is supported by grants paid to his institution from the NIH (U01 Al151810). ZAM declares no competing interests. We thank Noah Schuster for his help in designing the figure. Editorial note: The Lancet Group takes a neutral position with respect to territorial claims in institutional affiliations.