aids
In all but the poorest countries chronic diseases are the most serious health problem in poor countries.
Sorry bro, shedding is never a serious health problem unless there's a weird rash
aids
AIDS
Probably AIDS and HIV.
Premature birth is a major cause of serious health problems in neonates.
Lice infestation is a serious public health problem because some lice can carry organisms that cause other diseases, including relapsing fever, trench fever, and epidemic typhus.
Pollution is a very serious problem.It is very bad for health for everyone
intractable hiccups, which are hiccups that last months, can cause health problems and may be a sign of serious health problems.
depression
It can, but if you suspect a serious problem always talk to your health care provider.