can people become resistant to a vaccine
Whooping cough may be becoming resistant to vaccines. For the first time, American researchers have found evidence that the bacteria that cause whooping cough are becoming resistant to vaccines, a new study shows.
Once a person develops shingles, their body's immune system develops memory of the exposure that helps with the immune response if the virus reactivates. Having shingles boosts immunity against the virus. There is probably no immediate urgency to get the vaccine right after you have shingles, Tseng says.