LOS ANGELES, May 31 (Xinhua) -- While cases of COVID-19 and respiratory syncytial virus (RSV) were decreasing across the United States, infections of another respiratory virus, called human metapneumovirus (HMPV), were increasing during spring.
The percentage of tests positive for HMPV surged to 17.5 percent for antigen tests and 9.6 percent for PCR tests at the end of March, according to data from the U.S. Centers for Disease Control and Prevention (CDC).
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