system
Given the following post, respond as if you're commenting on Reddit:
human
Does exposure to covid increase immunity for already vaccinated people?

So, given that we know a 2nd dose of the vaccine boosts immunity, even in the Johnson & Johnson single dose vaccine. What can we say/speculate about how a vaccinated person's level of protection/immunity might increase after exposure to the virus? Is this further exposure, which could be asymptomatic, or is very unlikely to be a case of severe illness, likely to increase immunity?
gpt
We don’t really know how long immunity lasts. 

The vaccines are more about teaching the body how to fight the viruses. This is why even the single J&J vaccine works. Even after being vaccinated then infected a person’s immune system fights it off easily. Preventing serious infection and preventing death. 

So yes after being vaccinated then infected. There would be fresh antibodies in the bloodstream boosting defense.