Drug giant GlaxoSmithKline has shipped £835m worth of its swine flu vaccine to governments in the fourth quarter, but said it was too early to say what the final total would be.Shipments of the vaccine continue to be delivered in the first half of 2010 and GSK said is in ongoing discussions with many governments.The group said this includes renegotiation of contracts with governments who have announced changes to their planned immunisation programmes and with governments who have placed new orders for the vaccine. 'It is therefore too early to say what the final number of doses supplied and the value of these orders will be,' the group said.