Did you avoid the flu this season? Think it's over? Not so fast, the CDC is out with a warning today that a second wave of the potentially deadly illness is spreading across the country.
This time, the worrisome strain is Type B, which the CDC says is now accounting for 6 out of 10 flu cases. Federal health officials say illness associated with the B strain can be just as severe as influenza A, especially in young children. Data from the CDC shows 133 children have died of the flu since October.