dan barouch, director of the center for virology and vaccine research at the beth israel deaconess medical center. gentlemen, welcome to both of you. dr. barouch, i just want to get you to react to something this morning. the fda had dr. stephen hahn at 6:30 this morning, tweeted the following -- "with the country starting to open up this holiday weekend, i again remind everyone that the coronavirus is not yet contained. it is up to every individual to protect themselves and their community. social distancing, hand-washing and wearing masks protect us all." it's just interesting, dr. barouch, to see one of the administration's scientists, health experts, feeling the need to continue to remind the public of this. do you think the public is as informed about this risk this weekend as they should be? >> i think the public is very well informed, and there is a tension between the need to contain the virus and people's desire to get out of their houses. so, the hope is that through public health measures as well as eventually the development of a vaccine, that we will be able to contain this vi

dan barouch, the lead author on the study, has called today's results a breakthrough.earchers used the d.n.a. of the spiked protein for the coronavirus and inserted it into a plasma d.n.a. vaccine. iis helped the monkeys develop higher levels of antibodies, which lowered the level of the virus, following exposure. so how optimistic are you that you could get similar results in human trials? >> so, while data from humans will require rigorous clinical trials, these data, in an animal model, increases our optimism that the development of a vaccine for humans will be possible. >> reporter: researchers say eight monkeys who were exposed to the virus had no detectable trace of it, while the rest have very low levels. any idea how long the immunity lasts? >> that's a very important question, and we did not address that question in these studies. >> reporter: dr. barouch says this is just the beginning. he hopes today's findings will help accelerate vaccines in human trials. meg oliver, cbs news, montclair, new jersey. >> o'donnell: and this news tonight, president trump says