dr. alley raja is executive vice chair at the department of emergency medicine, massachusetts general hospital, joins us live from boston by skype. and i might just pick up on the point we were making there in the story. how do low vaccination rates affect communities and health systems? how much of a strain does it cause? it's a great question, miriam. and it really, as you mentioned, depends on the vaccination rates and the prevalence around the individual communities. for example, here in the u. s. we have really high vaccination rates here in massachusetts where i live. as of yesterday, 90 percent of our population had had at least one dose of the vaccine. so we're not seeing as much of a search as other parts of the country, but we're still seeing a served, especially with break through cases. i have to tell you though, and one thing that's really important to note is that over the past 2 to 4 months, even before on the crime, we had been seeing a surge of patients in emergency departments and hospitals around the country. patients who had put off care during cobit and unfortunat