Special Report: Obama's first 100 days in White House　

    WASHINGTON, April 29 (Xinhua) -- U.S. President Barack Obama said on Wednesday that his health advisors have not recommended closing U.S.-Mexico border.

    Speaking at a prime-time news conference marking his saying his100th day in office, Obama said health officials regarded it as pointless since the virus is already in the United States.

    "From their perspective, it would be akin to closing the barn door after the horses are out, because we already have cases here in the United States," Obama said.

    "This is a cause for deep concern, but not panic," Obama said, vowing that his administration will do whatever necessary to curb the epidemic.

    "We are continuing to closely monitor the emergency cases of the H1N1 flu virus throughout the United States. As I said this morning, this is obviously a very serious situation, and every American should know that their entire government is taking the utmost precautions and preparations," Obama said in an opening statement made at the press conference.

    He said public health officials have recommended that schools with confirmed or suspected cases of this flu strongly consider temporarily closing."

    And if more schools are forced to close, we've recommended that both parents and businesses think about contingency plans if their children do have to stay home," he added.

    The president has requested an immediate 1.5 billion U.S. dollars in emergency funding from Congress to support governmental ability to monitor and track the virus which has left one dead in the U.S. and to build stockpile and supply of anti-viral drugs and other equipment.

    Obama urged every American to take the same steps that need to be taken to prevent any other flu. He said his administration will continue to provide regular updates to the American public on the spread of the virus.

    "Everyone should rest assured that this government is prepared to do whatever it takes to control the impact of this virus," he said.

    The number of confirmed human swine flu cases in U.S. has risen to 91, officials from the U.S. Centers for Disease Control and Prevention said earlier Wednesday.