To a relatively new vaccine, most can now be prevented if people are vaccinated before they become sexually active.

I think the correct answer would be HIV infections. Vaccines of such infection are recently discovered and there are already trials done to a number of people. With the aid of this, there would surely be a decrease in the number of people who would have HIV.

Ifound this on google “aristotle (384–322 bc) in western scientific taxonomy the greek philosopher aristotle was the first to classify all living things, and some of his groups are still used today, like the vertebrates and invertebrates, which he called animals with blood and without blood.” i hope this you for what your looking for.

They create genetic variations