The FDA requires companies to provide safety-related information about cesium chloride before it is included in a dietary supplement.
The recall was issued after a suppler flagged a potential issue with specific lots of parsley that had been used.
The company said the AdviseDx test has demonstrated a 99.56% specificity and 95% sensitivity for patients tested 15 days after symptoms began.
The company said it felt a “special obligation under the current circumstances” to use its resources in a bid to end the pandemic as quickly as possible.
The drug is derived from a blood sample taken from one of the first U.S. patients to recover from COVID-19.
The American Medical Association (AMA) said the flu vaccine this year “is more important than ever."