Officials generally are pleased if a flu vaccine is 40% to 60% effective.
The shots tend to do better when they are well matched against the circulating flu strains. Officials say that’s what’s happened during this — relatively typical — flu season.
California's relaxed COVID isolation guidance marks a milestone in public health messaging about the pandemic: Even newly infected people no longer need to isolate if they have no symptoms, or they can leave home sooner if the illness starts improving quickly. ...
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