The Alabama Department of health says the current vaccine isn’t designed to stop the flu strain known as A/Switzerland. State Health Officer Don Williamson says this type of flu was identified too late to be put into the vaccine which includes four other strains. Williamson says the A/Switzerland strain will likely be the problem virus this year. A major concern of health officials is an increase in the number of health care workers who get sick. The center for Disease Control and Prevention found that over half of the samples that were tested in the US showed positive for the A/Switzerland strain. Williamson still encourages people to get the vaccine to protect against other strains and to lessen the severity of an A/Switzerland infection.