China hunted for train passengers Thursday who travelled with a man confirmed as the mainland's second swine flu patient, as state media urged citizens to be more responsible to help prevent an epidemic.
The health ministry confirmed Wednesday that a 19-year-old student recently arrived from Canada had been diagnosed with the A(H1N1) virus in east China's Shandong province, where he had travelled by train after flying into Beijing.
The news came just days after a 30-year-old man was confirmed as mainland China's first case, after arriving in the southwestern city of Chengdu from the United States via Tokyo and the Chinese capital.
Two cases of swine flu, which has killed more than 60 people worldwide, have also been confirmed in the semi-autonomous southern Chinese city of Hong Kong.
The 19-year-old student, identified only by his surname Lu, apparently started feeling ill on Sunday -- two days after landing in Beijing -- but still boarded a train to Shandong on Monday with a fever, sore throat and headache.
Authorities urged those who travelled near the man on either the Air Canada flight to Beijing or the train to the Shandong provincial capital of Jinan to come forward.
The provincial health department said late Wednesday that so far, only 19 of 44 people who travelled in the man's train carriage had been located. It was unavailable for comment Thursday.
Officials were also still searching for 28 people who travelled on separate flights to Beijing from Tokyo and Canada with the swine flu sufferers, according to the health ministry.