https://www.getwisdom.com/login/?redirect_to=https%3A%2F%2Fwww.getwisdom.com%2Fquestion%2Fdo-some-people-who-become-infected-with-coronavirus-covid-19-and-appear-to-recover-remain-carriers-who-can-still-infect-others-what-is-the-percentage%2F