From the American Academy of Pediatrics:
http://aappolicy.aappublications.org/cgi/content/full/pediatrics;108/3/790
" In 1999, an estimated 8800 children younger than 15 months were treated in hospital emergency departments in the United States for injuries associated with infant walkers. Thirty-four infant walker-related deaths were reported from 1973 through 1998.
The vast majority of injuries occur from falls down stairs, and head injuries are common. Walkers do not help a child learn to walk; indeed, they can delay normal motor and mental development."
HIV
HIV infecting a cell. The small blue dots are the HIV viruses attaching to the receptors on the cell (the cell is not really orange, but is colored that way for the picture).
