Jo Frost, known by her TV moniker “Supernanny”, has said she’s been diagnosed with the debilitating health condition anaphylaxis, but is determined not to have the illness “define” her.In a new video shared on Instagram,

Anaphylaxis is a severe allergic reaction that causes a dangerous drop in blood pressure, according to the Cleveland Clinic. When one goes into anaphylactic shock, it can be life-threatening if not treated immediately.