US Centers for Disease Control and Prevention released its flu spread assessment report today, citing that the H1N1 virus has affected major areas around the world over the last one year.

The Morbidity and Mortality Weekly Report made a number of suggestions for the prevention of H1N1 infections.

This year in February, the Advisory Committee for Immunization Practices (ACIP) said that the vaccine should be received by all, excluding the toddlers aged below 6 months.

CDC spokesman Tom Skinner said that the virus has infected the elderly and the young people at the most.

“The H1N1 strain has shown unusual patterns of disease, disproportionately affecting children and young adults and relatively sparing the elderly”, CDC was quoted as saying in MMWR.

The report claims that the number of people seeking treatments for flu has been the greatest this year since 1997.

The CDC officials tested as many as 40,000 flu samples during the period 2009-2010. The report is based on the analysis of the data gathered until June this year.

MMWR says that 99.8% of the total 91,152 affirmed cases of flu, reported over the last one year were essentially that of H1N1 infection.