Practice problem
How do vaccines speed up the coevolution of humans and viruses?
Vaccines are decreasing the population of viruses, and viruses are decreasing the population of humans
Humans are becoming immune to viruses, and viruses are becoming immune to vaccines
Vaccines are making viruses weaker, and humans are becoming stronger
Humans are becoming immune to vaccines, and viruses are becoming immune to humans
Type a concept, like “slope” or “photosynthesis”.
