There's evidence that certain vaccines boost the body's defense against many kinds of illness. Scientists are investigating whether this benefit extends to protection from COVID-19.
. In other words, they were doing something to boost the immune system's response to many kinds of pathogens.
In general, vaccines work by tricking the body to produce antibodies. These molecules are very specific. They typically target and neutralize only one type of infection.supercharge Unlike antibodies, myeloid cells are nonspecific — they work on many types of invaders. And they work quickly, when the virus first enters a person's body.
To figure that out, scientists around the world are currently running more than a dozen clinical trials with both BCG and the live polio vaccine to see if they offer some protection against the virus that causes COVID-19.
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