There are great organic bedding out there. They are ideal for people with Allergies because they are hypoallergenic.
Most bagless vacuums are ideal for people with allergies of any kind.
Yes they can. Many times they are allergic to their bedding because of the collection of dust. I would try new bedding and until you can get to the store put some paper towel at the bottom of their house. This way they are sitting on something they aren't allergic to.
For people with severe allergies, the best air purifier is the IQair HealthPro Plus. Although it sells for about $900, it is rated the best and can clean a 900 square foot room.
Cotton drapes or curtains would be best for a person with allergies.
A daybed is just like any other bed, so if there is someone sleeping in it regularly it should be changed at least once a week. Some people with allergies may need to change the bedding more often.
People have been using straw for thousands of years. It still makes good bedding.
Usually , cloth is the best choice for kids bedding.
No. You can't catch allergies from people with allergies.
Rainbow Vaccuum cleaners are the best for people with allergies. When they are used, less stuff goes into the air. When regular vaccuum cleaners are used lot's of stuff goes into the air. So Rainbow Vacuum cleaners are great for people with allergies.
The best alternative to down bedding depends upon personal opinion. Some alternatives to down bedding are wool and synthetic comforters.
Cotton bedding, as opposed to silk and other materials, can definitely cause allergies: http://www.truemores.com/a3-Silk-Bedding-And-Allergies.html Try an organic anti-allergen set of bedding.
Disney bedding has very good saftey ratings.