Converse of subject

• pose: The current level of risk to human health posed by H7 avian flu is very low.

Converse of object

• spread: However, Intervet claims these excretions would not be large enough spread avian flu.

• carry: They are unlikely to be carrying avian flu but they can suffer from other infections that people can catch.

Preposition: in

• bird: Our latest assessment is that there is a high risk of further global geographic spread of avian flu in birds.

Adjective modifier

• h5n1: There has only been one isolated case of H5N1 avian flu in the UK to date.

• h7: H7 avian flu remains largely a disease in birds, which does not transmit easily to humans.

Noun used with modifier

• bird: Avian bird flu is an affliction spread by the avian influenza viruses.