A White House nurse prepares to administer the H1N1 vaccine to President Barack Obama at the White House on Sunday, Dec. 20, 2009.
(Official White House photo by Pete Souza)
![vaccin-grippe](https://blog.libheros.fr/wp-content/themes/llorix-one-lite/images/no-thumbnail.jpg)
A White House nurse prepares to administer the H1N1 vaccine to President Barack Obama at the White House on Sunday, Dec. 20, 2009.
(Official White House photo by Pete Souza)