Neither (more than 'just the ones that are sick' but not everyone).
Test capability varies by locality but generally speaking, at this point, they are testing:
- People who show up with symptoms;
- People through contact tracing associated with positive cases;
- People in sensitive positions like health-care workers and government leaders;
- People who get a doctor's referral for whatever reason;
- People who show up at test sites (drive-through) and wait in line to get tested.
The scope of testing has expanded substantially in the last two weeks, and will continue to expand. In many locations, if you want a test, you can get it.