Lead author Dr Muge Cevik, of the University of St Andrews, said: ‘This is the first systematic review and meta-analysis that has comprehensively examined and compared viral load and shedding for… three human coronaviruses.’
It found that the level of virus causing the current pandemic is highest at the time symptoms begin, or before day five of symptoms.
In contrast, the viral loads of SARS and MERS-CoV peaked at 10-14 days and 7-10 days after symptom onset, respectively.
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