The Supreme Court on Wednesday refused to wade further into executive turf and rejected a PIL seeking door-to-door Covid vaccination drive, while reminding the petitioner that the court has already nudged the government towards announcing free universal immunisation of all above 18 years of age.The Supreme Court on Wednesday refused to wade further into executive turf and rejected a PIL seeking door-to-door Covid vaccination drive, while reminding the petitioner that the court has already nudged the government towards announcing free universal immunisation of all above 18 years of age.