MANILA, Philippines – The Department of Health (DOH) yesterday underscored the need to prepare for a second wave of the Influenza A(H1N1) pandemic even if the virus presently appears to be mild in nature. Dr. Lyndon Leesuy, program manager of the DOH for emerging and re-emerging diseases, said that historically, all pandemics have had second waves that were deadlier. “It may not happen but there is a possibility of mutation. The virus may become more virulent then,” he said in an intervi...