Covid appropriate behaviour, healthy diet, exercise- multiple lines of defence against Covid: Dr Arun Sharma Lists containment measures; appeals people to contact for Medicare on helpline Nos JAMMU: Covid appropriate behaviour, exercise, healthy and hygienic diet are multiple lines of defence against Covid-19 infection, said Medical Superintendent, Mother and Childcare Hospital Gandhi Nagar, Dr Arun Sharma. Elaborating further, he said ‘Covid Appropriate Behaviour’ is not limited to wearing face mask in public and frequent hand-wash, it also includes proper sanitisation of objects one comes in contact and proper social distancing while in public space. This is equally important to break the chain of transmission, said he.