drug that was used to treat former president trump, former governor chris christie. that same drug has also been administered to governor abbott now for treatment of covid. so he clearly understands the risk. i think the message here is also vaccines are not perfect. i don't know the timing of that third dose. it may have been very recent. but vaccines are not going to prevent all infections, especially if you're exposing yourself to this degree, to indoor crowds without a mask. this speaks to the need to be layering interventions, masking, improved ventilation and air filtration, socializing outdoors when possible, in addition to getting vaccinated. >> the head of the world health organization this month called for a halt on booster shots, saying the vaccine gap between wealthy countries and poorer countries in this world of ours has widened. so is it an ethical choice for the u.s. to make about supplying