Add to Cart Compare Quick view 11561909 Siemens Diagnostics. CLINITEST® Rapid COVID-19 Antigen Self-Test, 4/pk, 200 pk/cs (12cs/plt) (US Only) (cs) Siemens Diagnostics MSRP: Now: $2,825.00 Was: BAY 11561909_cs MSRP: Now: $2,825.00 Was: Add to Cart Compare Quick view