A.They make sure that they are asking flight passengers if they are sick.
B.They are taking a temperature of every passenger when they get off the airplane.
C.They are screening passengers on flights from Mexico.
D.They are forbidding people travelling to Mexico.
A.U.S.health officials are increasing surveillance measures at doctors’offices.
B.So far,the cases of swine flu in the United States are not very serious.
C.U.S. officials are determined to take more aggressive actions against swine flu.
D.Besser says the number of infections will probably rise.