physician and fellow at the brookings institute dr. kavita patel. he's an msnbc contributor. thank you, doctor for being here, we appreciate it. some experts suggest, they estimate about half of u.s. parents say they intend to get their children vaccinated. but about 37% use the reason, side effects, for citing why they won't get the vaccine with possibilities like allergic reactions, fever, other top concerns. walk us through. let's start with there. what are some side effects that are common for children in that age, 5 to 11? how serious are they? and what would your message be to parents about those concerns? >> yeah, so, jonathan, this is actually pretty incredible. because even for all of the other vaccines that we've been talking about, moderna, pfizer and johnson & johnson, and used to saying fevers in children like the flu, interestingly enough, in this reduced amount in pfizer in thousands of children that they observed and