Narrative:

Medical emergency. In cruise; I was notified that 3 of my flight attendants were sick and vomiting and another was nauseated. Notified company and declared a medical emergency. Deadheading flight attendants were used to make sure all doors were manned during landing. Normal flight; landing and taxi.

Google
 

Original NASA ASRS Text

Title: B777 CABIN CREW BECOME ILL AND INCAPACITATED; FLT CREW DECLARES MEDICAL EMER AND LANDS.

Narrative: MEDICAL EMER. IN CRUISE; I WAS NOTIFIED THAT 3 OF MY FLT ATTENDANTS WERE SICK AND VOMITING AND ANOTHER WAS NAUSEATED. NOTIFIED COMPANY AND DECLARED A MEDICAL EMER. DEADHEADING FLT ATTENDANTS WERE USED TO MAKE SURE ALL DOORS WERE MANNED DURING LNDG. NORMAL FLT; LNDG AND TAXI.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.