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.
That is false because justices interpret the constitution
I believe the answer is they were the first to trace the circulatory system.
The Magna Carta and the English Bill of Rights both served to "<span>(3) limit the power of the monarchy", since they put more power in the hands of the nobles. They were major steps to full democracy.</span>