CDC director gave latest recommendation on who should get tested for COVID-19

ABC News medical contributor Dr. Todd Ellerin on the latest in the fight against COVID-19.
2:22 | 07/04/20

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Transcript for CDC director gave latest recommendation on who should get tested for COVID-19
Have a good holiday. Be safe. Let's turn to Dr. Todd ellerin with more on the latest in this fight against covid-19. Thanks for being with us this morning. The CDC director gave ABC news his latest recommendations on who should get tested for covid-19. What is his advice? Yeah, good morning, Eva. So what Dr. Redfield said is that we really want to focus on asymptomatic individuals because they can transmit virus, especially if they've been at high risk for getting the virus, for instance, if they've been in crowds. He went on to say that roughly 20% to 80% of people infected may be asymptomatic especially if they're under 45. Also, 50% of people who are diagnosed with the infection don't know where they've gotten it from so it's really critical we do more widespread testing. Dr. Redfield also confirmed to us a concern that's been getting a lot of attention recently, that this virus has mutated. What has happened and what does that mean? Right. So it looks like the original virus from China has been replaced by a virus that's mutated. What a mutation means is an amino acid change that's a building block of the protein that changes and this is in the spike protein, that part of the virus that enters the cell. It looks like this virus is more infectious in cells, maybe more contagious so lead to more person-to-person transmission but the good news is it doesn't look more deadly at this time. All right, well, that's good to know. Lots of people, as you know, will be attending July 4th parties organization holding their own. What advice do you have for people to keep their guests safe and themselves safe this weekend? The most important thing is to recognize that this virus is not taking a holiday but here are some tips to try to be safe. So, one, we want to keep guests outside. Two, no sharing food or drinks. Using plastic utensils and paper products, we want to label cups. You don't want to grab your neighbor's cup. That's not good. Try to designate servers so people aren't -- a lot of hands on the bottles will lead to increased infection, and disposable hand towels and, remember, masks are really important. That has been shown to decrease transmission. A good reminder this holiday weekend. Wear your mask. Dr. Todd ellerin, thank you so much for being with us. Thanks, guys. Dan.

This transcript has been automatically generated and may not be 100% accurate.

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