Breaking—Hope Hicks was indeed SYMPTOMATIC on Wednesday night when she got tested. Which means she was most definitely contagious even before Wednesday (one can transmit while pre-symptomatic).

2) Source: https://www.bloomberg.com/news/articles/2020-10-02/trump-aide-hope-hicks-tests-positive-for-coronavirus-infection

3) Yet here is Trump mocking Joe Biden at Tuesday's debate for wearing a mask

4) There is an “incubation” time from exposure to symptoms (if any). But that varies widely. Average 5 days. But sometimes 2 days sometimes 14 days or even occasionally longer. So exposure of initial infection doesn’t mean instantly contagious to others.

5) We need a long discussion of Hope Hick and incubation time. Because it matters how many need to be quarantined and how quickly we need to find other cases. https://twitter.com/drericding/status/1311875744532967424

6) And let’s not also forget risk of airplane transmissions on AF1...

There was a case of Korean woman who carefully wore an N95 mask on a plane entire time *except when using the bathroom *—and still infected. Assuming handwashed, suggest airborne. https://wwwnc.cdc.gov/eid/article/26/11/20-3353_article