In order to avoid being contaminated by possibly dangerous organisms. and to avoid contaminating the subject them selves.
Because the small living microorganisms can kill humans by there diseases.
so that they don't kill him?
Masks and gloves
It depends what they are handling, if it is something toxic, then yes they will wear masks.
They wear lab coats and goggles as well as some other protections. FAMILY FEUD: Lab coat Lab goggles Gloves Mask
Nurses use gloves and medical masks.
gloves, office, clipboard, patients paperwork, masks, tongue depressors and more.
They would wear white outfits with masks, so they wouldn't breathe anything in. Don't forget gloves!
GLOVES, MASKS,overhole,safety shoes,fire alarm,fir fighting,midical aid box,..
Egyptologists typically wear comfortable clothing suited for fieldwork, such as breathable materials like cotton or linen, along with sturdy shoes for walking in archaeological sites. They may also wear protective gear like hats, sunglasses, and sunscreen to shield themselves from the sun.
CFX Masks is perhaps the best place to go for the best quality. They provide a huge selection of masks, silicone gloves, foam latex appliances, teeth, and props. There is also SPFX Masks. They also provide a good selection of masks, but they do not cover anything additionally. A new (as of 2011) website called Shattered FX has a full line of high Hollywood quality silicone masks, silicone half masks, molds and props to choose from as well.
Here are basic PPE for the dental industry: surgical masks protective eyewear protective clothing gloves
Vaccines, quarantines, antibodies, immune system, anti-biotics, gas masks, gloves, washign your hands all the time, and a ton more.
In the laboratory it is necessary to use gloves, sometimes masks and to work in air ventilated/air filtered hoods.