Alyssa Milano has revealed that Covid-19 caused her hair to fall out and urged people to wear face masks to help curb the spread of the virus.On Monday, the Melrose Place star shared a video on Twitter and Instagram to show the amount of hair loss she says she experienced as a “long hauler” – a term used to refer to someone who suffers from long-lasting coronavirus symptoms.In the clip, Milano can be seen combing through her hair with a detangler brush to reveal clumps of hair that fall out with