SWINE FLU WATCH UPDATE

Quarantine officers monitor travelers with a thermographic device at an arrival gate at Narita International Airport in Narita, east of Tokyo, Japan, Sunday, April 26, 2009. Asian health authorities were on alert Sunday, with some checking passengers and pork products from Mexico, as the World Health Organization declared the deadly swine flu outbreak a public health emergency of 'pandemic potential.' (AP Photo/Itsuo Inouye)

40 CASES IN UNITED STATES...

EU: Don't travel to USA and Mexico...
*US calls EU travel warning unwarranted...
**Russia to check all planes from Americas...
JANET: NO TESTING OF INCOMING PLANE PASSENGERS...
STATE DEPT TO ISSUE TRAVEL WARNING TO MEXICO...
Every passenger arriving in Britain from Mexico screened...
UK INVESTIGATING 17 POSSIBLE CASES...
**2 CONFIRMED...
Flu could boost gov't intervention further...
Spreads to Europe, markets edgy...