State health officials say most flu cases this year in Colorado have been caused by the influenza A, or H3N2, virus, which can cause a more severe flu season with more hospitalizations. Reported influenza hospitalizations and outbreaks in long-term care facilities in Colorado have recently increased. Officials say immunization is the best protection, and recommend getting your flu vaccine as soon as possible. During past seasons, there have been more hospitalizations and deaths when the H3N2 flu virus has predominated, particularly among older people, very young children and people with certain chronic medical conditions. To reduce spread of the flu, the state health department encourages everyday actions such as covering your cough and sneezes, staying away from sick people and washing your hands often. If you’re sick, stay home from work or school so you don’t spread the virus to others.