15 points and a to right answer!
chicken pox is a virus that causes an itchy rash but typically does not have any major or lasting effects on an infected person. before 1995, chicken pox parties were popular. in a chicken pox party, healthy children were brought around children who were sick with chicken pox so that they would be exposed to the virus and their immune system would learn to fight it. a vaccine for chicken pox was developed in 1995, and chicken pox parties are now rare. what best describes how vaccines have advanced science?
a) vaccines are more effective on ethnicities that are highly susceptible to a disease.
b) vaccines can determine which genes can cause disease.
c) vaccines can minimize lifestyle choices that allow for greater exposure to a disease.
d) vaccines allow for building immunity without harmful exposure because not all viruses are safe to be exposed to.

The tasmanian devil, a marsupial carnivore, is facing extinction due to devil facial tumor disease (dftd) which causes bulging cancerous lumps and lesions to erupt around the face and neck — often causing enough deformation to make seeing or eating difficult. dftd has evolved into a contagious cancer, a trait that is unique among cancers. devil mating behavior involves biting around the head and neck, allowing cells from one individual — especially cells from the crumbly dftd tumors — to be transferred to the wounds or face of a new individual. this marsupial was once found across australia, but sea levels rose, isolating the tasmanian population, while the australian population went extinct. what would be an outcome of genetic isolation that is likely to have impacted the spread of dftd? a) reduced territory puts diseased individuals in greater contact with non-diseased ones. b) inbreeding results in less variation in facial features so the cancer is generally fatal. c) genetic isolation has made it difficult for scientists to develop a vaccine against dftd. d) the lack of genetic variation in the immune system of tasmanian devils minimizes resistance to the disease.

What causes temperature extremes in the desert

24. how are vaccines used to keep people healthy?