Over the last few years, in several countries, there have been large outbreaks of the influenza virus. which statement correctly describes the outbreaks? a. this represents an epidemic because the outbreaks were a viral, not a bacterial, illness. b. this represents a pandemic because the outbreaks took place in several different countries. c. this represents an epidemic because the outbreaks were contained to the individual countries. d. this represents a pandemic because it involves an illness that has no known cure.

Explain why methicillin resistant staphlococcus aureus (mrsa) is more prevalent now than it was only 30 years ago. a. antibiotics cause mutations in staphlococcus aureus that lead to an increase in the number of methicillin-resistant strains. b. methicillin resistance causes an infection to spread more rapidly. c. frequent and inappropriate use of methicillin-type antibiotics has provided selective pressure that has resulted in an increase in the proportion of methicillin-resistant strains of staphlococcus aureus. d. diseases like aids have made people more vulnerable to infections from staphlococcus aureus.