Researchers tested more than 70 percent of residents in a small Italian town that locked down in February due to COVID-19.
About 42.5 percent of residents with confirmed COVID-19 infections were asymptomatic. There was no statistically significant difference in asymptomatic and symptomatic patients’ viral load, which offers a measure of infectivity.
The study’s findings highlight the difficulty of controlling COVID-19’s spread when so many people may not realize they have the virus. Study authors said a strong testing and tracing strategy can help identify these individuals and contain the pandemic.
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How COVID-19 affects the brain: 4 things to know
Where new COVID-19 cases are rising, falling and staying the same — June 29
‘Worst is yet to come,’ WHO chief says; Hospitalizations up in 7 states — 6 COVID-19 updates
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