Joke Collection Website - Public benefit messages - The door didn't go out. How did you receive a text message from the CDC saying that it overlapped with COVID-19's case?

The door didn't go out. How did you receive a text message from the CDC saying that it overlapped with COVID-19's case?

The CDC filters the displayed information through big data.

1. When you get a call from the CDC, maybe big data shows that you may have had contact with COVID-19 cases or asymptomatic infected people.

2. It may also be exposed to the environment or articles polluted by COVID-19.

3. Only if there is such a risk, the CDC will call to remind you.