NEW YORK (AP) — Fear of the coronavirus has led people to stock up on hand sanitizer, leaving store shelves empty and online retailers with sky-high prices set by those trying to profit on the rush.

Good news? More of the clear gel is on the way. Purell, the best-selling hand sanitizer, is pumping up production. And Walmart and other stores say they are talking to suppliers to stock up bare shelves.

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Sales of hand sanitizers in the U.S. were up 73% in the four weeks ending February 22nd, compared with the same period the year before, according to market research firm Nielsen.