Pingtung County health officials reported Sunday two serious cases of swine flu, including the first such case involving a pregnant woman in Taiwan. Health officials said that of the two patients seriously affected by the H1N1 strain of the flu, one has recovered while the other -- a 25-year-old pregnant woman -- is still in intensive care. The officials said the woman, 24 weeks pregnant, began to cough Aug. 9. She developed a fever the following day and went to the hospital for emergency treatment. She began to develop pneumonia Aug. 13, and was later confirmed to have been infected with the new influenza A flu strain. Health officials said pregnant women are at the highest risk of contracting swine flu and are more likely to develop serious complications from the virus than the average patient. They also indicated that the flu progresses faster in pregnant women and noted that the World Health Organization has suggested that pregnant women be the top priority group to be vaccinated against the flu strain. The Centers for Disease Control (CDC) reported on Saturday that a six-year-old girl had died from the H1N1 strain, the second person in Taiwan to have died from the flu virus. 