People's understanding of immunity started from infectious diseases and anti-infection immunity.

The basic features of infectious disease are A: There are infectivity, pathogen, epidemic, immunity. B: There are infectivity, patients, immunity, epidemic. C: There are source of infection, route of transmission, susceptibility, immunity. D: There are infectivity, epidemic, endemic, relapse. E: There are pathogen, reinfection, epidemic, immunity.

T cells are critical for innate immunity. _____

1. But even big aquifers are not ______ __________ (immunity) to the laws of physics.

NF-kB signaling is important in A: development. B: immunity. C: inflammation. D: all of the above

‏NF-kB signaling is important in‍ A: development. B: immunity. C: inflammation. D: all of the above

What is the focus of this special issue of the journal? A: How immunity develops in the infants. B: How infants maintain an optimal nutrition. C: How the conceptualization of immunonutrition evolved. D: How nutrition is related to immunity, especially in infants.

NF-ĸB signaling is important in A: development B: immunity C: inflammation D: B and C

Which<br/>one of the following is the reason of pandemic<br/>flu<br/>() A: virus<br/>has strong virulence <br/>(B)HA<br/>of Influenza B: virus<br/>easily produce variation, and people lack of immunity <br/>(C)<br/>NA of Influenza C: virus<br/>easily produces variation, and people lack of immunity<br/>(D)<br/>Influenza D: virus<br/>develops new subtype virus, and people lack of immunity

After the epidemic infection of infectious diseases, specific immunity is obtained, which increases the immune population and reduces the susceptibility of the population.