Exposure to one nasal droplet enough for Covid infection – study
by Hannah Devlin Science correspondent from on (#5VPM9)
Trial in which volunteers were given dose of virus is first to monitor people during entire course of infection
Exposure to a single nasal droplet is sufficient to become infected with Covid-19, according to a landmark trial in which healthy volunteers were intentionally given a dose of the virus.
The trial, the first to have monitored people during the entire course of infection, also found that people typically develop symptoms very quickly - on average, within two days of encountering the virus - and are most infectious five days into the infection.
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