<Table> <Tr> <Th colspan="2"> Swine flu </Th> </Tr> <Tr> <Th> Synonyms </Th> <Td> Pig influenza , swine flu , hog flu , pig flu </Td> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> <Tr> <Td colspan="2"> Electron microscope image of the reassorted H1N1 influenza virus photographed at the CDC Influenza Laboratory . The viruses are 80 -- 120 nanometres in diameter . </Td> </Tr> <Tr> <Th> Specialty </Th> <Td> Infectious disease </Td> </Tr> <Tr> <Td colspan="2"> ( edit on Wikidata ) </Td> </Tr> </Table>
which animal is the carrier of the h1n1 virus
Pig