Porches cost a median of $67 per square foot, but vary from $20 to $85. These high end prices include all sorts of special lighting, and other perks. The materials for decking are about $5 per square foot, and average installation plus materials is about $20.he average custom home building costs for custom homes built in the United States is right around $83 per square foot. The median price however was $78 per square foot.
Two main types of HIV vaccines are currently being tested -- preventive and therapeutic. Preventive HIV vaccines: 1  Are tested in people who are HIV-negative. 2  Train the immune system to recognize and fight off HIV before it can establish infection and make the person sick.
There are 5 main hepatitis viruses, referred to as types A, B, C, D and E. These 5 types are of greatest concern because of the burden of illness and death they cause and the potential for outbreaks and epidemic spread.afe and effective vaccines are available to prevent HAV. Hepatitis B virus (HBV) is transmitted through exposure to infective blood, semen, and other body fluids. HBV can be transmitted from infected mothers to infants at the time of birth or from family member to infant in early childhood.