If swine flu symptoms can be mild, how would i know if my toddlers have had it?

Antibody testing: But very few people would do this out of curiosity and there is no clinical indication to do these tests except for epidemiological studies. Make sure they get the flu vaccine each season when it is released.

Swine flu: A mild flu (influenza) can present just like a common cold. However a blood test can determine whether your toddlers had it.