Theory Behind Vaccines
A person receiving a vaccination is injected with a dead or "stunned" (weakened) form
of the virus. This is done so that the body can learn to identify the virus and make antibodies
capable of neutralizing it. When the virus enters the body it will immediately be recognized and the
proper antibodies will be released to kill the virus before it attaches to a host cell. There are a
few problems associated with vaccinations: 1) "stunned" microbe may become active and
dangerous 2) vaccine may be expensive and dangerous to people that are preparing them
3) some are ineffective, e.g., cholera vaccine and 4) some may not yet exist, e.g., vaccine for
malavia. Parasitic diseases are hard to defend against because the virus (parasitic) can mutate
and assume many different forms (strains). This makes vaccinations for parasitic diseases almost
useless because it may be vaccinated against a particular strain of the virus, but the antibodies
may not be effective to any of the other strains that pertain to the same virus.