Cases of H7N9 avian influenza in China have had experts worldwide on edge since the end of March. There is still much to be learned about the new bird flu strain, inspiring researchers in Vietnam to probe deeper.

Cases of bird flu in China have been keeping officials worldwide on edge for weeks as numbers of new patients steadily increased.

Being sick while pregnant certainly isn't fun. Having the flu while pregnant is even worse. But being down with the flu during pregnancy might be linked to longer term concerns, too.

One of the concerns parents might have with the flu vaccine is side effects in children with pre-existing conditions, such as inflammatory bowel disease.

Cases of the H7N9 avian influenza have so far mostly stayed within Chinese borders, with only one case discovered outside of the mainland in Taiwan.

News has been developing fast from the H7N9 bird flu outbreak in China. But what do we know about the patients who have been infected with the disease? Are there common threads in these cases?

Officials across the globe have been closely watching the developments of bird flu cases in China, and now the zone being monitored has expanded.

Counts of infections from the H7N9 strain of bird flu have been increasing since the first case was reported at the end of March.

The reports of the H7N9 bird flu strain in China have had health officials on alert. The latest development could cause further concern and potentially mean easier transmission of infection.

Increases in the number of cases of the avian influenza in China, including a case with no symptoms, have health officials preparing for the possible discovery of new cases.