Checks for the deadly enterovirus 71 should continue because the virus in Taiwan could take a year to hit the SAR, a microbiology expert said yesterday. Paul Chan Kay-sheung, assistant professor from the Chinese University's microbiology department, has returned from a visit to Taiwan - where the virus has killed more than 50 people. He was among a six-strong delegation to the island and said local health authorities should not be complacent. 'The Taiwan virus will take a year to arrive . . . we can't be relaxed so soon,' he said. The warning came as four children aged from six months to four years joined the confirmed list yesterday, bringing the total to 38 confirmed and four suspected cases. Professor Chan said information obtained from the visit was extremely useful and would be passed on to public hospitals. 'Taiwan doctors showed us video tapes of severe cases, took us to visit recovered patients and shared their clinical experience with us extensively. 'We will share the information with our local colleagues later this week so that we can be more alert and vigilant on the Taiwan symptoms before serious complications emerge,' he said. The delegation returned from the four-day visit on Saturday. Three EV71 swabs taken from patients with mild to severe complications were brought back to Hong Kong. They will be used to help develop more sophisticated tests that are sensitive to the Taiwan strain of the virus.