What Is a Chloride Blood Test? The chloride blood test, sometimes called a Cl test or serum chloride test, is a simple blood test that measures your chloride levels. Why do chloride levels matter? You ...
Polymerase chain reaction (PCR) and rapid (antigen) tests for COVID-19 both involve taking a swab. Results for a PCR test take longer, as it needs to go to a laboratory. It is more costly but tends to ...
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