Wear a respirator. 

Also, when using a respirator make sure it offers the right protection.

If you do decide to continue looking at homes you should consider buying a respirator at Home Depot or Lowe's and keeping it in your vehicle for this reason. 

Like the Monday morning after a frat party bad, I wore a respirator with VOC filters and still felt like I was a 6-pack deep.

Ponder on this, you need a lead test if you are to touch any paint near a window if the house is built pre-1978, and if it tests positive, you need to hire somebody who has EPA certificate, they have to get a full coveralls, painters hat, shoe covers, and respirators, then you need an abatement company to throw away those garbage bags even if its only a few chips of paint.

Asbestos should always be handled by licensed professionals, they will spray it with water, create a vacuum so none of the dust gets throughout the house or airspace, respirators, full body suits, ect.

Wear moon suits and respirators.

So if I had a relative on a respirator and they yanked them off and they died, I'd be ranting at the state because its their policy that allowed the hospital to do it.I'm currently more freaked about the red stuff, now.

You pick a cool all day drizzle in early spring, put on a rain suit,a respirator mask,and goggles. 

Respirators that offer protection against vapors are recommended.