Lena H. Sun

• Post Reports

For the first time, a virulent strain of bird flu has been detected in U.S. dairy cows. Fragments of the virus have also been found in commercial milk. Today, health reporter Lena Sun shares the latest on the outbreak and why the risk to humans remains low.

• Health

Some officials and experts express frustration that more livestock herds aren’t being tested for avian flu.

• Health

With traces of bird flu found in cows milk, understand the human risk

• Health

Dairy cows must be tested for bird flu before moving across state lines under a new federal order, as evidence mounts that the virus is more widespread than feared among American cows.

• Health

The finding does not suggest a threat to human health but indicates the avian flu virus is more widespread among dairy herds than previously thought.

• Health

Federal officials are preparing for the possibility of additional human cases of bird flu, testing components to create an H5N1 vaccine after a Texas dairy worker was infected with the highly virulent virus.

• Health

This is the second case of a human sickened by this highly virulent strain of bird flu in the United States, raising questions about whether this pathogen is now more easily transmitted among mammals.

• Health

Five states have been affected, with evidence the virus may be spreading cow-to-cow.

• Health

U.S. cases of measles, which can cause symptoms like fever, coughs and rashes, are rising. The MMR vaccine is a safe and effective way to prevent infection.