mizuho morrison, an emergency physician in southern california, she's also the senior director of medical education at hippo education, doctor, good to see you. >> so good to see you, thank you so much for having me back. >> all right, so how encouraged are you about this pending authorization for this johnson & johnson vaccine. >> the medical board is very encouraged, we have a third very strong legitimate vaccine as an option and certainly will increase our effort to combat this virus. >> and then there are some officials who are concerned that some americans may view the johnson & johnson vaccine as, you know, second class because its efficacy rate is below 90%, unlike the pfizer and moderna. how should people be accepting and thinking and feeling about johnson & johnson? >> you know, you have to look at the numbers sort of relatively. meaning their study was done later before pfizer and moderna. therefore their numbers are going to be a little bit off. really, to know which one is most, you know, superior, what you have to do is have a head to head comparative trial, which we've not d