A friend recognizes value in vaccinating in general - against major diseases - but with a caveat that they are opposed to the flu vaccine specifically.
They claim that vaccines weaken the immune system, and reasoned that (in conjunction with the fact that flu vaccines may only offer ~40% (random example) efficacy against some strains, some given flu season) this weakening of the immune system actually increases occurrence and/or chance of illness.
Is it true that vaccines "weaken the immune system" ?
Whether flu vaccines specifically, or vaccines in general.
I tried Googling this, but most results pertain to vaccination for those who are already immunocompromised ?
One source writes :
Is there any evidence that vaccines do cause illness and immune system dysfunction?
One answer came in a careful study of illness patterns observed in babies before and after vaccination, published in Clinical Pediatrics in 1988. If vaccines cause a weakened immune system, then we would expect to see a higher incidence of illness following vaccination. In that study conducted in Israel, the incidence of acute illnesses in the 30 day period following DTP vaccine was compared to the incidence in the same children for the 30 day period prior to vaccine. The three-day period immediately following vaccine was excluded because children frequently develop fever as a direct response to vaccine toxins. A total of 82 healthy infants received DTP, and their symptoms were reported by parents and observed by a pediatrician at weekly intervals. Those babies experienced a dramatic increase in fever, diarrhea, and cough in the month following DTP vaccine compared to their health before the shot.
But that article's subsequent anti-vaccine extremism makes me disregard that claim, without significant research towards proper debunking of its source, if it exists.
Are there any legitimate studies that support / oppose the notion that vaccination weakens the immune system in otherwise healthy people ?