3 ms·
Doesn't work as well and is now actively discouraged by current guidelines. The immunity induced is so much lower that it's almost not worth it.
by amaccuish 9y ago
Doesn't work as well and is now actively discouraged by current guidelines. The immunity induced is so much lower that it's almost not worth it.
- yeukhon 9y agoTo back it up: https://www.cdc.gov/flu/protect/vaccine/quadrivalent.htm https://www.cdc.gov/flu/protect/vaccine/quadrivalent.htm