Restrictions on travel in the United States\u00a0and school closure will not stop the spread of avian flu across the nation, but they may buy some time to distribute vaccines and other drugs, Reuters reports.This conclusion is based on a study published Monday in the Proceedings of the National Academy of Sciences, according to Reuters.Timothy Germann, a representative of the Department of Justice\u2019s Los Alamos National Laboratory in New Mexico, told Reuters, \u201cIt\u2019s probably not going to be practical to contain a potential pandemic by merely trying to limit contact between people such as by travel restrictions, quarantine or even closing schools.\u201dThe study is in support of the U.S. government\u2019s ongoing effort to prepare for a potential pandemic, according to Reuters. Last summer, the U.S. government spent roughly $162 million to stock up on vaccines, even though it expressed some concerns regarding the drugs\u2019 effectiveness.\u201cOur model suggests that the rapid production and distribution of vaccines, even if poorly matched to circulating strains, could significantly slow disease spread and limit the number ill to less than 10 percent of the population, particularly if children are preferentially vaccinated,\u201d wrote a team from the Los Alamos lab and the University of Washington, according to Reuters.Los Alamos National Laboratory\u2019s Catherine Macken said the study used a computer model to determine that distributing a weak vaccine to a large number of people would be more effective than vaccinating few people with a very strong drug, Reuters reports.\u201cIf you reduce somewhat the length of time that someone is infective \u2026 you end up getting a significant impact,\u201d Macken told Reuters. \u201cYou might be better off vaccinating twice as many people, getting a lower level of protection, but still getting an improvement in susceptibility.\u201dAccording to Reuters, drugs like Roche\u2019s Tamiflu and GlaxoSmithKline\u2019s Relenza could also potentially prevent or retard the spread of influenza infections.The deadly H5N1 strain of avian flu has already decimated poultry stocks across parts of Asia and Europe and has killed more than 100 people. Experts fear a mutation that would make humans more susceptible to the virus, sparking a global pandemic.According to the Los Alamos and University of Washington team\u2019s computer simulation of the spread of avian flu, the entire U.S. population could start to experience a pandemic as early as one month after the flu\u2019s earliest identification in the country, Reuters reports.That computer model assumes that roughly 66 percent of people in the United States\u00a0would eventually be infected, according to Reuters. This number is based on the rates of infection in the 1957 and 1968 pandemics, Reuters reports.For related CSO content, read Planning for Pandemic and Researchers: Immunizations, Quarantines Would Stem Flu Pandemic.For related news coverage, read Report: First Bird Flu Vaccine is Only Partially Effective; GlaxoSmithKline Tests Two New Treatments.Keep checking in at our CSO Security Feed page for updated news coverage.