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America has been struggling since the very beginning of this pandemic when it comes to testing

for COVID. And now that the vaccine is here, you may think that's all in the past that we no longer

need to test for COVID at all, but you would be wrong. COVID tests might actually be now more

important than ever. And we could Sarah Morrison's here to explain. Hey Sarah. Hey Teddy. So explain

to me why we need COVID tests. If people are getting vaccinated, isn't this done? Well, no,

vaccines don't mean that all this goes away as much as I'm sure we like millions of Americans

and the rest of the world hasn't been vaccinated yet. Children can't be vaccinated yet. We're

seeing cases go up. Basically, people are still going to get COVID, so we're still going to need

tests. But we also made a lot of progress in the kinds of tests that we have available and

different use cases for them. So there's been a lot of progress on that level too, which, you know,

is good news. Okay, but for folks who have been vaccinated, will they ever need to get tested again?

First of all, we don't know how long the immunity that those vaccines provide last.

Okay. There's still some questions over how effective they are against the emerging variants.

So if you have symptoms, even if you've been vaccinated, you should get tested. So there's going

to be more testing. Tell me about that. Here's like a quick overview of tests. The test that

most people are most familiar with because it's the only one we had in the beginning was the PCR

...