Five years ago, on March 11, 2020, the World Health Organization declared the outbreak of COVID-19 a global pandemic[1]. The novel coronavirus, dubbed SARS-CoV-2[2], began as a “cluster of severe pneumonia cases of unknown cause” reported in Wuhan, China, in December 2019. It had spread to 118,000 cases reported in 114 countries by March 11.
Dr. Tedros Adhanom Ghebreyesus, WHO director-general at the time, said in a media...