![Mexicans wear face masks in the belief that the masks will protect them from the influenza A (H1N1) virus, formerly referred to as swine flu, in Mexico City in this combination photo. Mexicans wear face masks in the belief that the masks will protect them from the influenza A (H1N1) virus, formerly referred to as swine flu, in Mexico City in this combination photo.](https://c8.alamy.com/comp/2D2MGB1/mexicans-wear-face-masks-in-the-belief-that-the-masks-will-protect-them-from-the-influenza-a-h1n1-virus-formerly-referred-to-as-swine-flu-in-mexico-city-in-this-combination-photo-mexico-began-shutting-down-all-non-essential-work-and-services-on-april-30-2009-to-slow-the-spread-of-a-new-flu-strain-as-officials-urged-increased-worldwide-precautions-against-an-imminent-pandemic-reutersstaff-mexico-2D2MGB1.jpg)
Mexicans wear face masks in the belief that the masks will protect them from the influenza A (H1N1) virus, formerly referred to as swine flu, in Mexico City in this combination photo.
![UK Nurse with protective swine flu mask and goggles about to perform a swab on a swine flu patient Stock Photo - Alamy UK Nurse with protective swine flu mask and goggles about to perform a swab on a swine flu patient Stock Photo - Alamy](https://c8.alamy.com/comp/FXNE8R/uk-nurse-with-protective-swine-flu-mask-and-goggles-about-to-perform-FXNE8R.jpg)
UK Nurse with protective swine flu mask and goggles about to perform a swab on a swine flu patient Stock Photo - Alamy
![Female Nurse wearing protective swine flu mask_8 - License, download or print for £12.40 | Photos | Picfair Female Nurse wearing protective swine flu mask_8 - License, download or print for £12.40 | Photos | Picfair](https://res.cloudinary.com/fleetnation/image/private/c_fit,w_1120/g_south,l_text:style_gothic2:%C2%A9%20Julian%20Claxton,o_20,y_10/g_center,l_watermark4,o_25,y_50/v1436385848/srekg0u306zt3lb6hys7.jpg)
Female Nurse wearing protective swine flu mask_8 - License, download or print for £12.40 | Photos | Picfair
![Business People Fearing H1n1 Swine Flu Virus Wearing Protective Face Mask And Standing In A Row. Stock Photo, Picture And Royalty Free Image. Image 5899110. Business People Fearing H1n1 Swine Flu Virus Wearing Protective Face Mask And Standing In A Row. Stock Photo, Picture And Royalty Free Image. Image 5899110.](https://previews.123rf.com/images/nyul/nyul0911/nyul091100330/5899110-business-people-fearing-h1n1-swine-flu-virus-wearing-protective-face-mask-and-standing-in-a-row.jpg)
Business People Fearing H1n1 Swine Flu Virus Wearing Protective Face Mask And Standing In A Row. Stock Photo, Picture And Royalty Free Image. Image 5899110.
![A Model Wearing A Mask To Prevent 'Swine Flu' Infection. Isolated Stock Photo, Picture And Royalty Free Image. Image 5939471. A Model Wearing A Mask To Prevent 'Swine Flu' Infection. Isolated Stock Photo, Picture And Royalty Free Image. Image 5939471.](https://previews.123rf.com/images/bds/bds0911/bds091100477/5939471-a-model-wearing-a-mask-to-prevent-swine-flu-infection-isolated.jpg)