Ulat mula sa Public Health England at Department of Health na pinamagatang NERVTAG Sub-committee on the Pandemic Influenza Facemasks and Respirators Stockpile: Mga pormal na rekomendasyon sa Department of Health, na may petsang 01/09/2016.
Ulat mula sa Public Health England at Department of Health na pinamagatang NERVTAG Sub-committee on the Pandemic Influenza Facemasks and Respirators Stockpile: Mga pormal na rekomendasyon sa Department of Health, na may petsang 01/09/2016.