HuffPo: “Early in the pandemic, an exposure to COVID meant waiting anxiously for many days to see if you were infected. Now, the window is getting smaller and smaller, according to a new review published in the journal JAMA Network Open. Researchers analyzed 141 studies to determine how COVID’s incubation period ― the time from when you get infected to when you start showing symptoms ― has changed since March 2020. The study, which was conducted by scientists in Beijing, found that with every new variant, COVID’s incubation time has decreased significantly. Omicron, which is the current dominant variant in the United States, has the shortest time between infection and symptoms.“The incubation periods of COVID-19 caused by the Alpha, Beta, Delta and Omicron variants were 5.00, 4.50, 4.41, and 3.42 days, respectively,” the study stated. It’s worth noting that the studies analyzed in the review largely relied on people recalling their date of infection and the date symptoms started from memory, so there is room for error if any study participants misremembered. But, two experts told HuffPost that they agree with the findings and are seeing a shortened incubation period in their own work, too…”