Congenital heart defects O are present at birth
O result from poor diet
O affect mainly older people
O can be prevented with regular exercise

Astudy shows that an influenza vaccine is 71.4% effective in preventing a particular type of influenza. if 15,422 people receive the vaccine, how many would not be protected and would be likely to get infulenza?

Which situational condition decreases the chances of crimes?

Can you get chlamydia from sleeping in the same bed