It is the flu that cannot be contained: Two more people, a 34-year-old man and a 41-year-old woman, have died from complications from swine flu in New York City. Almost 20 city schools are still closed after the flu-related death of an assistant principal in Queens. Meanwhile, there are four confirmed cases of the flu on a cruise ship that is now docked in Sydney. Its 2,000 passengers have been advised to quarantine themselves for a week. While swine flu appears to be tapering off in many areas, it has resurged in New Jersey, New York, and New England. About 46 countries have reported 13,000 cases of swine flu and 92 deaths, with most in Mexico. More than half of the confirmed cases have been in the U.S. where at least 10 people have died. Most flu pandemics infect one-third of the global population before fading away.