The Delhi High Court on Friday called for strict action against those found violating masking and hand hygiene norms at airports and in aircraft, observing that the COVID-19 pandemic has not abated and keeps springing its ugly head up. The high court said all such persons, who are found to be violating these norms, should be booked, fined, and should be placed on the no-fly list and added that it is essential to introduce sufficient deterrence to enforce compliance with norms.