It's hard for people understand that while there can always
be a very low chance of serious side effects that in
medicine and we really have to go by percentages and
does the benefits outweigh the risk. Vaccines
are basically concept whereby the body is shown
heart. Passage and so that he can avoid the illness
but still mounds and immune. Before
seeing that passage in in the future. The
durability or duration of vaccine immune protection
Gary's feast on a number of factors. Each of the individual
who's been vaccinated the health of the individual who's
been vaccinated. Hands of the passage and that is
contained in the vaccine. The
history of vaccines is extensive and it's the east time
millions and millions of people around the world in different
racial and ethnic groups in different countries for different
pathogens. And vaccines and go through rigorous testing
in terms of clinical trials. Initially and lab settings which
is called in vitro and then in Geneva which is in a real
living organism. First in an animal and then in human
being and there can
always be side effects of vaccines and we see the deed in
clinical trials and that is before the vaccine gets
authorization. Or approval for use and so a side effect
could be anything from pain or redness at injection Slade
to headaches fatigue muscle aches some GI disturbance.
It runs began and so that is why clinical trials are done and
that's why they're done with ten. Tens of thousands of
people.