According to a new survey from Orlando Health, more than half of parents surveyed believe that their child can get the flu from the flu shot and one-third believe the shot does not protect against the flu.

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Researchers say many parents are unaware that it takes about two weeks after getting the vaccine for the body to build up antibodies to adequately protect against the flu, during which someone is still susceptible to contracting the virus. When someone gets sick within that time period, they may incorrectly assume that the flu was caused by the shot.

In addition to the effectiveness of the flu shot, the survey also found that many parents question the vaccine’s safety, as well. 30 percent think that the flu shot is a conspiracy, while 28 percent believe it can cause autism.