Your aunt gets the cov1d 19 vaccine. How does it protect her from the diseas? How does it protect her from getting infected with the SARS CoV 2 virus?

The vaccine creates antibodies against corona in her body.

A vaccine forces your immune system to make antibodies against a specific disease in her body, usually with a dead or weakened form of the germs. Then, when they  come into contact with them again, her immune system knows what to do.

Explanation:

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.