Here’s what you need to know about RSV—and why experts say new treatment developments are promising
Here’s what you need to know about RSV, why cases are so high right now in the U.S., and why experts say these new developments are so promising., RSV is a respiratory virus that primarily spreads through coughing, sneezing, and other forms of close contact. It’s also seasonal: In the U.S., RSV is at its worst in the winter months. Anyone can catch or spread RSV, but people with healthy immune systems tend to suffer only mild cold-like symptoms.
Older adults with weakened immune systems have a harder time staving off the virus—as do young children, whose still-developing immune systems have never been exposed to the pathogen. They are more likely to have severe RSV infections, which can include symptoms such as dehydration and difficulty breathing.
“RSV was unequivocally the most important cause of serious respiratory disease in infants and young children” before COVID-19 came along, says, director of the University of Maryland School of Medicine’s Center for Vaccine Development and Global Health. Young children are also especially vulnerable because their airways are narrow: Among children younger than one, RSV is the leading cause of bronchiolitis, the inflammation of airways in the lung.It’s not unusual for the U.S.
Neuzil says that it’s unclear whether this change is permanent or whether RSV will ultimately revert to its , which begins as early as mid-September but peaks from late December to mid-February. It also remains to be seen whether the current surge represents the peak of this year’s RSV season—or whether the worst is yet to come.Researchers have spent decades attempting to prevent RSV deaths. But an effort to develop a vaccine in the 1960s
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