How do vaccinations work to keep patients healthy?
A) They remove any trace of disease or pathogens from the human body.
B) They provide additional white blood cells, which work to fight off diseases.
C) They help build up the skin to better block out disease and pathogens.
D) They introduce a weakened form of a disease so the body can learn how to fight it off.

Christopher came down with chicken pox after spending time in his child’s day care. the chicken pox represents what link in the chain of transmission in this scenario?

Which of the following best reflects what we know about how the flu virus moves between species? a) the flu virus in a pig is mutated and replicated in alternate arrangements so that humans who eat the pig products can be infected.b) a flu virus from a human epidemic or pandemic infects birds; the birds replicate the virus differently and then pass it back to humans.c) an influenza virus gains new sequences of dna from another virus, such as a herpesvirus; this enables it to be transmitted to a human host.d) an animal such as a pig is infected with more than one virus, genetic recombination occurs, the new virus mutates, the virus is passed to a new species such as a bird, and the virus mutates again and can now be transmitted to humans.

Anyone like cabela’s ? if you never been you def need to