Flu spreads in symptomatic phase, study says

People infected with flu who are asymptomatic may be less important in the spread of the disease than initially thought, according to research.

Researchers in Hong Kong and the US found that the majority of viral shedding from sufferers of flu occurred during the first few days of symptomatic illness.

The study tracked 135 people with confirmed flu virus infection. Researchers assessed patients' viral shedding over the course of seven days and used molecular tests to identify flu strains.

They found that most viral shedding occurred during the first 2-3 days after illness onset.

The researchers estimated that just 1-8% of infectiousness occurred prior to illness onset.

Only 14% of infections with detectable shedding were asymptomatic, and viral shedding was low in these cases.

Stephen Robinson

Stephen Robinson recommends

Swine Flu Resource Centre

Read more

Have you registered with us yet?

Register now to enjoy more articles and free email bulletins

Register

Already registered?

Sign in

Before commenting please read our rules for commenting on articles.

If you see a comment you find offensive, you can flag it as inappropriate. In the top right-hand corner of an individual comment, you will see 'flag as inappropriate'. Clicking this prompts us to review the comment. For further information see our rules for commenting on articles.

comments powered by Disqus