The Antigen test has an expiration date printed on the cassette package.
Clarity Antigen Tests have a 1.5 to 2 year shelf life.
The CareStart Tests have a three to six month shelf life.
The CareStart Antigen tests expiration has been extended by the manufacturer and the FDA. They are valid PAST THE PRINTED DATE FOR 3 MONTHS.
(If your test shows expiring June 20, 2021 it is now valid through September 20, 2021, etc.)
SEE HERE FOR FDA LETTER.