B2 Revision
Vaccine questions
True or False
True False
True False
True False
True False
True False
True False
True False
True False
True False
True False
Microorganisms may enter
the body and cause illness before the immune system can destroy them.
True False
Vaccinations provide
protection from microorganisms by creating antibiotics before infection.
True False
A vaccination contains a
usually unsafe form of a disease-causing microorganism.
True False
Vaccination can never be
completely safe, since individuals have different degrees of side effects from
a vaccine.
True False
To prevent epidemics of
infectious diseases, it is only necessary to vaccinate a small percentage of a
population so that the infection cannot spread easily.
True False
New vaccines against
influenza have to be developed regularly because the virus changes its antigens
very quickly.
True False
It is difficult to develop
an effective vaccine against the HIV virus (which causes AIDS) because the
virus damages the immune system and has a high mutation rate. Mutations produce
changes to its antigens.
True False
MMR is an example of a
vaccination where there has been controversy over its safety.
True False
Vaccinations cannot be used
against viruses.
True False
Microorganisms with a high
mutation rate may change their antigens frequently making a vaccination less
effective.
True False