recommend them as soon as thursday. two sources tell cnn the fda is planning to allow americans to mix and match coronavirus vaccines when they receive their boosters. >> you cannot get a booster of whatever vaccine you got initially, that should not preclude you from trying to get yourself protected. >> reporter: but the plan is already causing confusion as the fda will allow mixing and matching. they'll encourage people to get the same kind of vaccine they got initially, according to "the new york times." that as colder weather once again brings cause for concern. new cnn analysis shows five states already experiencing cold weather are now seeing the biggest pockets of increases. not everyone can be convinced to get a vaccine, jake. we know that. nobody knows better than local health department officials. they are now citing increases in violence, threats and harassment from anti-vaxxers, so much so that a group of these local health officials from across the