Shanghai health officials reported two new H7N9 avian influenza cases, in a 52-year-old man and a 37-year-old woman, the first infections reported in the city since the middle of February.
Minnesota has now had seven outbreaks on turkey farms in just over a month, affecting 343,000 birds.
A new H5N1 strain may be associated with a sharp increase in human cases in Egypt.
H5N2 strikes a 5th Minnesota turkey farm and backyard poultry in Montana, and China detects H5N6.
Although influenza in the United States continues to decline, it has now been elevated for 19 consecutive weeks, has caused seven more pediatric deaths, and continues to create record levels of hospitalization in the elderly, the Centers for Disease Control and Prevention (CDC) reported today in its weekly update.
H5N2 on 2 more commercial farms mark South Dakota's 1st and Minnesota's 4th such outbreaks.
A study involving more than 160,000 elderly US military veterans suggests that the high-dose (HD) influenza vaccine didn't lower their risk of hospitalization for flu or pneumonia overall, compared with standard-dose (SD) vaccine, but it did reduce the risk for those 85 and older.
H5N2 and H5N8 continue in US birds, but testing in Minnesota found no further infected poultry.
A 39,000-bird turkey farm was hit by H5N2, and H5N1 killed pelicans in Romania.
Egypt has 10 more cases in the past few days, and both Indonesian cases involved likely poultry exposure.
