When you get a vaccine it injects a controlled amount of the illness into you, so the immune system can build up an immunity. The memory cells come into play when the illness comes back.
Like an example?
if an example it can be
<span>Alzheimer's disease</span>
By telling your community how to protect themselves in their enviroment
it a reality
i just guessed because a close friend of mine got a date online
The first thing that a student should do when developing an action plan is to d. clarify the goal after doing that we write the list of actions, then organise them and prioritise what needs to be done.
so OD
