and we're seeing that with the breakthrough infections, that vast majority of those individuals are elderly individuals. so that is another group i think that would warrant it as well. >> what do you make of the cdc now strengthening its advice that pregnant women should be vaccinated? up until now, they said that the vaccine could be used for pregnant women, they can use the vaccine, now they are strengthening that advice and recommending it. is that significant? >> absolutely. so this is good news both for pregnant women and also women of child bearing potentials who had expressed concern around the covid-19 vaccine because of concern around fertility and also pregnancy outcomes. and so there is emerging data still being collected on pregnant women and the cdc looked at about 2500 women and did not find anymore adverse pregnancy outcomes than occurs in the general population. so that is good news assuming other pregnancy registries that