Over 600,000 face masks have been declared safe-for-use, less than a day after they were withdrawn from SA hospitals.

The N95 masks, produced by 3M were removed from use yesterday after being deemed ineffective in protecting workers against “fluid strikes.”

The masks had been provided by the national stockpile and used by intensive care staff at the RAH, however, questions of their effectiveness were raised after a RAH nurse tested positive to COVID-19.

Commonwealth health authorities have since clarified with SA Health that the masks are indeed compliant with Australian standards.

Prime Minister Scott Morrison told Melbourne talk radio station 3AW that the removal of the masks was a “false alarm,” however could not provide any further explanation about what led to the masks’ removal.

Nine staff at the RAH have been placed in quarantine following their interactions with the nurse who tested positive.