Uh

It's an ingredient in a vaccine

Hmm

Catch measles? Or immunity from measles

Got a source for that friend?

Couple things

1) It doesn't "put your immune system in overdrive". It just teaches the immune system to recognize the disease and kill it on the spot after the vaccination or series is complete. This is how your immune system always operates. It's like an elephant. It never forgets. Or forgives.

2) You generalized all vaccines using a study that did not actually study a causal link to it. The study in question studied the rare vaccine outcome of autoimmune disorders, of which there is no clear link: `The individuals who might be susceptible to develop these reactions could be especially not only those with previous post-vaccination phenomena and those with allergies but also in individuals who are prone to develop autoimmune diseases, such as those with a family history of autoimmunity or with known autoantibodies, and the genetic predisposed individuals.`

3) From the discussion section: `The analysis of potential correlation between vaccine and autoimmune events/diseases is puzzling, being not-specific and without a clear cut diagnosis, not excluding other contemporary virus infections, environmental factors, or nutrition imbalance. `

4) `In conclusion, clinical surveillance of potential autoimmune adverse effects and appropriate laboratory tests should be considered for inclusion in the monitoring protocol.`

5) `Reports on autoimmune reactions after vaccination would constitute probably less than 0.01% of all vaccinations performed worldwide, although this rate may be biased by under-reporting.`