Oh, yes, I have seen that very often. Symptoms are nearly the same as getting the flu. The type of vaccine, live or inactivated, is relevant though, but it can

Oh, yes, I have seen that very often. Symptoms are nearly the same as getting the flu. The type of vaccine, live or inactivated, is relevant though, but it can happen with both. Your immune system is weakened for a time until you have produced. Moderate training is no problem though, perhaps even helpful, but exhausting yourself can lead to problems.