Patient zero refers to the first infected patient in the epidemiological study population.
The author of the new scientific work analyzed the chronology of the pandemic, studied the first mentions of the outbreak, which appeared in December 2019. Scientists have sequenced samples from the earliest COVID-19 patients in Wuhan to trace the history of the virus.
It is reported that a woman who traded seafood at the Huanan market in Wuhan became patient zero for COVID-19. Her illness began on December 11th. After that, other people with similar symptoms, salespeople and market visitors began to end up in hospitals.