Diseases like the one destroying humanity right now impact human populations by taking away a considerable amount of people away. This can be arguably effective in tackling overpopulation in places like India and China, whilst negatively affecting places like the USA, which could lead to higher immigration and more problems
Love your neighbor as yourself. Or Love the Lord thy God with all your heart, with all your soul, with all your mind, with all your strength
Active immunity
Active immunity is when something triggers an immunity system to produce antibodies, this something being a vaccine. Hope this helps!
To prevent injuries, because if you are running around and exercising, if you haven't warmed up, you could pull a muscle or injure yourself. Cool downs help calm your body down and lower your heart rate.
