It is true if that's what you're asking.
Answer:
The big thing is that, in countries with high life expectancy, their old people are more likely to feel engaged. This can be a cultural difference, or it can be geographical; old people are more likely to do things if they can physically get around.
hope it helps
Answer:
Carlos Juan Finlay
Explanation:
He discovered that yellow fever is transmitted from infected to healthy humans by a mosquito.
There can be lots but some main ones are pesticides and disinfectantas hope this helps :)
