Question

covid-19 is the disease caused by the sars-cov-2 virus and spreads through respiratory droplets. if you contract this disease the first time you encounter this pathogen, which of the following is not true? this pathogen presented nonself proteins to your immune system. your body’s immune system is using immune memory to attack this pathogen. your body has mounted a primary immune response against this pathogen. this pathogen overcame the external defenses of your immune system. this pathogen overcame the internal, innate defenses of macrophages.

Explanation:

The question involves a first encounter with SARS-CoV-2. Immune memory is formed after the first exposure, so it cannot be used during the initial infection. Other options are true: pathogens present nonself proteins, first exposure triggers a primary response, and contracting the disease means the pathogen overcame external/innate defenses.

Answer:

Your body's immune system is using immune memory to attack this pathogen.