Human challenge study:

"researchers found that symptoms start to develop very fast, on average about two days after contact with the virus. The infection first appears in the throat; infectious virus peaks about five days into infection" https://t.co/Pcyth7gadE

— Benedict Barclay (@BarclayBenedict) February 2, 2022

These were young (aged 18-30) and healthy volunteers, who agreed to be deliberately exposed to the virus. Of the 36 participants, 18 developed an infection.

— Benedict Barclay (@BarclayBenedict) February 2, 2022

Volunteers deliberately infected w/ SARSCoV2 became contagious in just 2 days, much earlier than scientists originally estimated. Finding is from the 1st human Covid 'challenge trial.' UK study had 36 young/healthy volunteers. Viral load peaked at day 5 https://t.co/xJx2cwLJ7E

— delthia ricks 🔬 (@DelthiaRicks) February 3, 2022

https://t.co/0uKg1Kl2HI

— KittyPooh (@KittyPo80176717) February 3, 2022