Consequently, vaccines against poliovirus, measles and yellow fever confer lifetime immunity while a new influenza vaccine is needed every year.

The live virus vaccine promised lifetime immunity, while the original Salk vaccine did not.

Before the advent of vaccination, the best protection was catching and surviving the disease in childhood, which gave lifetime immunity.

He succeeded in isolating the virus of jungle Dread and producing a serum that gave lifetime immunity.

However, they are usually eliminated by the immune system, conferring lifetime immunity to the host for that virus.

However, recent outbreaks of mumps among adolescents and young adults have raised questions about lifetime immunity from the vaccine.

People who have had chickenpox almost always develop lifetime immunity (meaning you can't get it again).

And the protective effect of the mumps vaccine wears off, unlike mumps itself, which affords lifetime immunity.

Until then, I had no idea that the ministers and prime ministers of some countries enjoyed special lifetime immunity.

There are four types of dengue virus, and infection with each confers lifetime immunity.