or longer ago. why should younger people get getting that? >> thank you for having me back on. that's the question. the reason why is because the studies have shown there is waning immunity against infection, meaning that if people are more than two months out from their johnson & johnson, more than six months out from an mrna vaccine they are more likely to get infections. we're concerned the breakthrough infections could be contributing to the cases we are seeing. that is why young people even though healthy should get vaccinated. >> okay. so, then, by that explanation, do you think that booster shots might be an annual thing like the flu shot? can we booster ow way out of this pandemic? >> to be honest, a-of-i do think at the very least we will be boosting yearly. for covid. because we are seeing that after a certain number of months, there is decreased effectiveness of the vaccine against