capacity right now. we've had to divert ambulances over the last several weeks because of the huge number of patients coming in. that has a big impact on the rest of the city. it's wall to wall. we have no capacity left at the hospital. >> reporter: the message from health care experts to get vaccinated and boosted also comes with a renewed push to limit the spread of the virus. and to alleviate long lines at testing sites across the country, you can now order free at-home coronavirus tests from the federal government, online or by using a new hotline. >> people need a test immediately. we continuously encourage them to utilize one of the testing options out there in addition to the website. 20,000 community-based testing sites nationwide. federal surge sites, dozens of which have opened online. >> reporter: nadia romero, cnn, atlanta. and the rapid spread of the omicron variant of covid-19 have left parents with their young