不是，是介词短语，词性为副词，中文意思是惊慌
What the government should do is to calm down the public whenever they are in panic.政府应该做的，是在公众恐慌的时候让他们安下心来。
Hospital workers in at least one case deserted their workplace in panic, thus halting the administering of potentially unclean disease spreading injections, but Ebola has not disappeared.
