An experimental universal flu vaccine is being administered to patients as part of a clinical drug trial at the National Institutes of Health, reports CNN.

If all goes well, this new shot would last for multiple flu seasons, so you wouldn’t have to roll up your sleeve every fall and — importantly — it would be more effective than the shot you get now.

With the seasonal vaccines we receive now, each shot can only protect against three or four strains of the flu — meaning scientists have to make an educated guess about which strains to put in it every year. But a universal flu shot would theoretically cover every strain of the flu using what’s known as an ice cream cone approach.

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