Seasonal Flu Shots
Researchers provide evidence for an association between seasonal flu shots and increased shedding of influenza A viruses via breathing in a study published in the journal PNAS January 18, 2018. They also note that other studies suggest annual flu vaccination leads to reduced protection against influenza, which means each vaccination is likely to make you progressively more prone to getting sick. The question that remains to be definitively answered is: Are vaccinated individuals with influenza more contagious than unvaccinated individuals with influenza?
A 2012 Chinese study found a child’s chances of contracting a respiratory infection after getting the seasonal flu shot rose more than fourfold, and research published in 2014 concluded that resistance to influenza-related illness in persons over age 9 years in the U.S. was greatest among those who had NOT received a flu shot in the previous five years
