Why do we need two doses of vaccine?
Vaccination is a two-fold protective measure for preventing illness. The first dose alerts the immune system to the presence of a certain virus or bacterium, and it creates a cellular immunity of sorts. The second dose is required to alert the body's antibodies, which are typically slower acting but more powerful bodies of defenses. These antibodies present themselves naturally in our bodies after vaccination, forming what we know as "natural specific immunity." To get that natural specific immunity from your second vaccination shot, you will need both injections at least six weeks apart.
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