Study explains why flu hits pregnant women

Pregnant women suffer more from flu than other members of the population because of a heightened immune reaction, a study shows.

The discovery is unexpected since immune responses are thought to be suppressed by pregnancy to prevent a woman's body rejecting her unborn baby.

Researcher Dr Catherine Blish, of Stanford University in the US, says: "We now understand that severe influenza in pregnancy is a hyper-inflammatory disease rather than a state of