Dr. Saqib Shahab said when asked about the importance of mask use Thursday.He stressed that mask use is just one of many “layers” of protection against COVID-19, and said socializing in low-risk scenarios like virtual households can be done safely without masking up.Shahab acknowledged that masking up “does not come naturally for most”, and that making usage a habit takes time.However, he added that scientific evidence does support their effectiveness.“No-one likes to be asked to do something that they’re not used to, but at the same time the evidence is clear that this simple action can make a dramatic difference.