People wait in line for a flu vaccine in San Mateo, California October 15, 2004. A shortage of influenza vaccine following problems at a British plant could have been eased if countries did not limit manufacturing licences to so few suppliers, a leading medical journal said on Friday. With the flu season fast approaching, the United States is facing a shortage of vaccine doses after a British regulatory agency halted shipments from Chiron Corp's Liverpool plant because of contamination problems. The move means about 48 million doses, nearly half of the 100 million destined for the U.S. market, may be destroyed. REUTERS/Kimberly White KW/GN