Drug giant GlaxoSmithKline has received approval from the US Food and Drug Administration to begin deliveries of more than 7m doses of its swine flu vaccine.It will begin exporting the FluLaval vaccine, which it manufactures in Canada, to the US next month. The US is ordering about 250m doses of the treatment from a variety of companies. Glaxo had initially been excluded from the programme as its treatments contain adjuvants, which the US had decided not to use.