COVID-19.One popular theory blames people returning from spring break vacations abroad right before everything was locked down, and a new study using genetic sequencing seems to confirm that hypothesis.“It was really the barrage of spring break, where you do have in a short period of time, really, lots of people,” explained Dr.
Jesse Shapiro, a McGill microbiology professor and one of the study’s authors.Shapiro and his co-authors sought to track the early spread of the virus using genetic sequencing.
The team read the genetic code of the virus in 734 early Quebec COVID cases, then compared it to similar data from other countries.