Local and global health authorities have so far been unable to contain the crisis and warned the human and economic impacts could be worse than the SARS outbreak that killed nearly 800 people last year.
One expert said bird flu had the potential to devastate travel and retail sales around Asia in the same way SARS did, if it becomes contagious among humans.
Sex before marriage is no longer taboo for most young people in Shanghai, and men appear to have abandoned the once commonly held view that their future bride must be a virgin.
Young people who did poorly in their studies and had low expectations about their academic future were more likely to have a liberal attitude toward sex.