1 Depending on the tile selected, do-it-yourself tiling of the floor of a typical bathroom can cost $100-$1,500 or more. 2  The tile alone can be $1-$40 or more a square foot; replacing backer board adds about $2 a square foot; and do-it-yourself tools and other material can be $60-$200 or more. Retiling around a bathtub or inside a shower enclosure can cost $800-$2,500 or more, depending on the type of tiles, total square footage, the amount of repairs needed, any special pattern or border, and local labor rates.
The Ebola virus was first identified in 1976 when 2 simultaneous outbreaks occurred, 1 in Yambuku, a village not far from the Ebola River in the Democratic Republic of Congo and the other in a remote area of Sudan.
Formal tracking (surveillance) of AIDS cases began that year in the United States. In 1983, scientists discovered the virus that causes AIDS. The virus was at first named HTLV-III/LAV (human T-cell lymphotropic virus-type III/lymphadenopathy-associated virus) by an international scientific committee.This name was later changed to HIV (human immunodeficiency virus).ver decades, the virus slowly spread across Africa and later into other parts of the world. The earliest known case of infection with HIV-1 in a human was detected in a blood sample collected in 1959 from a man in Kinshasa, Democratic Republic of the Congo.