You probably will not get chickenpox again, but the virus can cause shingles in adults.

Such an increase may not be significant in children, whose heart risks are low, but it could cause concern in adults, committee members said.

However, this drug can often cause excitement or confusion instead of drowsiness in older adults.

Chickenpox can cause dangerous complications in newborns, adults, and pregnant women.

Larger doses may cause fatal poisoning in adults and children.

Sugar-sweetened drinks have also been speculated to cause weight gain in adults.

Ibuprofen may be more likely to cause stomach bleeding in adults who are 60 or older.

Cold temperatures can cause serious health problems, especially in infants and older adults.

About half a dozen times a year, this causes paralysis and occasionally death, sometimes in unvaccinated adults.

Aspirin may cause Reye syndrome in teenagers and young adults.