In Britain Doctors on Wednesday started the task of vaccinating millions of vulnerable patients against swine flu.<br/><br/> <br/><br/>The move comes as a primary school in Wales has been forced to close after some pupils tested positive for the virus. <br/><br/> <br/><br/>The gates at Pontyberem Community primary school in Carmathenshire, the first to close in the country, are due to reopen after the half-term holiday.