Here is an article from ABC News about immunity,
Immunity to COVID-19: Front line health workers consider deliberate infection
Get it early, develop immunity, get back to work: some wonder
By Dr. Delaram J. Taghipour
March 24, 2020, 11:55 AM
https://abcnews.go.com/Health/immunity- ... d=69756590
Quote:
" Immunity is an intricate and convoluted experience for your body, and we are only in the infancy stages of understanding the immune response to COVID-19. How your immune system gets activated, the length of activation, the magnitude, how it spreads, and whether it stays present in different parts of your body can all differ based on the virus. This may mean that immunity may be temporary, if it exists at all.
That being said, speculation that the body will build immunity to COVID-19 exposure is reasonable. In fact, a mild exposure to a germ or virus prompts your body to launch germ-fighting tools (macrophages, B-lymphocytes, T-lymphocytes, etc.). After the infection, the immune system remembers what it learned and is able to defend against another attack.
In essence, that is how vaccines work. So, whether through exposure or vaccine, if our bodies build immunity, we may be able to protect our front line now, and eventually protect everybody -- a concept referred to as herd, or community, immunity."