RSV usually starts with signs that look like a regular cold—runny nose, mild cough, and slight fever. But in some infants, especially those within one year of age, RSV can worsen rapidly.

We may use terms like cold and the flu as if they are the same thing, but there are some key differences between them.

There were more than 35,000 cases of whooping cough last year in the US, the highest number in more than a decade, and 10 people died — six of them less than 1 year old.

RSV case numbers also remain high, with the 347 cases so far the most through the first two months of the year since at least 2017. The positive test rate of nearly 14.5% is the highest rate ...