We have a fourth strain a flu going around – one that had not been anticipated when this year’s flu vaccine was created. That’s because the Fujian strain has mutated from the A-Panama strain. The flu vaccine helps protect us against Panama. The State Health Department’s Sue Denney says it’s not clear what, if any, protection the vaccine gives against the virus that morphed from it. She says the best thing to do is to get a flu shot and practice good hygiene – washing hands, shielding your mouth when you sneeze – things like that.