Coronavirus may be most contagious before symptoms in the carrier appear, new study finds.
Tara Smith, a professor of epidemiology at Kent State University who was not involved in the study, said the research confirms both previous findings of presymptomatic transmission and that infected people seem to have a high viral load right around the time they began showing symptoms.Presymptomatic transmission is also seen in viruses like influenza and measles, Smith said, but is not seen with other coronaviruses like SARS and MERS.
Smith said more testing needs to be done to determine the role presymptomatic and asymptomatic transmission is playing in the current pandemic. She said these findings emphasize how important it is to keep social distancing measures in place to prevent those kinds of transmission. "That's why its important to avoid people as much as possible, to wash your hands, to wear masks," she said. "To prevent you from spreading the virus."
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