2 doctors weighed in:

How do vaccines prevent disease?

2 doctors weighed in
Dr. James Ferguson
Pediatrics

In brief: Building immunity

By injecting material that is identical to the stuff that makes up the shell a germ lives in, you can trigger the immune system to make an anti-body that will attack anything that tries to invade the body dressed in that shell.
This can be made new in a lab or just by killing the germ & using the left over shell.

In brief: Building immunity

By injecting material that is identical to the stuff that makes up the shell a germ lives in, you can trigger the immune system to make an anti-body that will attack anything that tries to invade the body dressed in that shell.
This can be made new in a lab or just by killing the germ & using the left over shell.
Dr. James Ferguson
Dr. James Ferguson
Thank
Dr. Marcus Degraw
Pediatrics

In brief: Immune response

Its more complicated than 400 words can say, but vaccines contain the same antigens or parts of antigens that cause diseases.
When they are injected into fatty tissue or muscle, vaccine antigens are not strong enough to produce the symptoms and signs of the disease but are strong enough for the immune system to produce a response. See ttp://www.Cdc.Gov/vaccines/vac-gen/howvpd.Htm.

In brief: Immune response

Its more complicated than 400 words can say, but vaccines contain the same antigens or parts of antigens that cause diseases.
When they are injected into fatty tissue or muscle, vaccine antigens are not strong enough to produce the symptoms and signs of the disease but are strong enough for the immune system to produce a response. See ttp://www.Cdc.Gov/vaccines/vac-gen/howvpd.Htm.
Dr. Marcus Degraw
Dr. Marcus Degraw
Thank
Get help from a real doctor now
Dr. Jonathan Jassey
Board Certified, Pediatrics
13 years in practice
1M people helped
Continue
108,000 doctors available
Read more answers from doctors