Protective face coverings
When performing workplace drug testing or healthcare drug tests it is advisable for the person performing the drug test to always wear a disposable face mask, and the employee being drug tested to wear a face covering or mask and only take it off if an oral drug test is being used. The face mask or covering should then be put straight back on. A face visor for the collector would give extra protection, and can be worn over the face mask or on its own.