As Covid dissipates in the U.S., cold and flu viruses may return with a vengeance

A curious thing happened during the Covid-19 pandemic: With masks, social distancing, and Purell galore, we kept most other germs at bay.

Flu vanished. Cases of respiratory syncytial virus, or RSV, which in a normal winter puts nearly 60,000 children under age 5 in the hospital, were nonexistent. Most of us appeared to sidestep the soup of bugs that cause colds.

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