Infection of others happened within days
The research, part of an ongoing CDC-supported study, followed 101 people initially infected with Covid-19 in Nashville, Tennessee, and Marshfield, Wisconsin, between April and September.
Along with some 191 others who lived in their households, the infected people were trained to self-collect specimens — nasal swabs only or nasal swabs and saliva samples — each day for 14 days. In addition, each person completed a symptom diary.
Home sanitize with clean steam.