Vaccines Flashcards
what is variolation
intentionally exposing someone to a weak form of the smallpox virus to cause a mild case that would lead to immunity
what did Edward Jenner do to vaccinate people against smallpox
inoculated a boy with cowpox virus to give him immunity to smallpox(created the first vaccine)
what role did Pasteur have in advancing vaccines
Attenuated Bacterial Vaccine
-cholera and anthrax vaccines discovered how to weaken a disease to administer a safe vaccine
what is the principle of vaccination
administration of a formula to induce pathogen specific adaptive immunity and memory B and T cells
what infectious diseases have been eradicated
smallpox
rhinderpest
what are the goals of vaccination
-increase resistance to infection
reduce probability of developing clinical disease/reduce symptoms
-reduce transmission of disease
establish herd immunity
what is herd immunity
protecting a whole community from disease by immunizing a critical mass of the population
what are characteristics of ideal vaccine
-long term protective immunity
-one/few doses needed
-safe
-retains activity at different temps(stable)
-easy administration
-suitable for max vaccination(any age or immuno capabilities)
-easy to manufacture on large scale
-low cost
what US government agency regulates human vaccines
FDA
common(local) adverse effects to vaccines
swelling
pain/soreness
how was the myth of autism from vaccines fabricated
Andrew Wakefield’s scientific fraud
in 1998 scientist published a paper on a link between MMR vaccine and autism, it was later fully retracted by 2010
how is the anti-vaccine movement a threat to public health
lessens ability for herd immunity and allows for spread of disease
describe Pasteurs Cholera vaccine experiment
he gave a chicken an injection of an aged/weak version of the disease(pasteurella multocida) noticed it remained healthy, then gave it an injection of the full strength disease and noticed that it didnt die to to the previous weak injection
what does the R0 equation indicate
the average ability to the spread of an infectious disease
what disease is most spreadable? least?
most: measles(11-18)
least: seasonal flu(1.3)
critical mass immunization needed for measles herd immunity
95% immunization
live attenuated vaccines
weakened form of the pathogen
inactivated vaccines
killed form of the pathogen
subunit vaccines
purified proteins of the pathogen
recombinant vectored vaccines
harmless viruses producing proteins of the pathogen
DNA/RNA vaccines
DNA or mRNA coding for the proteins of the pathogen
what protein allows for viruses to bind
spike protein
where were inactivated virus vaccines used for covid
china and russia
where was a DNA vaccine used for covid
india