To prevent a repeat of last winter’s “tripledemic” of respiratory illnesses, Americans will be encouraged to roll up their sleeves not just for flu shots but for two other vaccines, one of them entirely new.
Federal health officials have already asked manufacturers to produce reformulated Covid vaccines to be distributed later this year. Recently, the Centers for Disease Control and Prevention took an additional step, endorsing two new vaccines against respiratory syncytial virus for older Americans.
The three shots — flu, Covid and R.S.V. — may help to reduce hospitalizations and deaths later this year. But there are uncertainties about how the vaccines are best administered, who is most likely to benefit, and what the risks may be.