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Batch of swine flu vaccines studied in Canada

Associated Press/Boston Globe, November 25, 2009

Canadian doctors have been advised not to use a batch of 170,000 doses of swine flu vaccine while authorities investigate reports of allergic reactions among recipients, drug maker GlaxoSmithKline PLC said Tuesday. Authorities routinely monitor vaccines for any signals of problems, such as the allergic reactions that do occur, rarely, every year. Company spokeswoman Gwenan White said that GlaxoSmithKline advised medical staff in Canada last week to refrain from using one batch of the vaccine while they look into reports that that it might have caused more allergic reactions than normal. GlaxoSmithKline, the world's second largest drug maker by revenue, is only investigating the one batch of its swine flu vaccine in Canada. White said no other doses of its swine flu vaccine around the world are affected.