New Delhi: Any vaccine against COVID-19 should be granted emergency use authorisation only after proper consideration and conducting its trials on a sufficient sample size, a parliamentary panel chaired by senior Congress leader Anand Sharma has recommended to the government.In a report submitted Monday to Rajya Sabha chairman and Vice President M Venkaiah Naidu, the Parliamentary Standing Committee on Home Affairs also said there was a need for a comprehensive public health law to keep a tab on private hospitals and check black-marketing of medicines.The report comes even as the government considers applications of at least three firms seeking emergency approval to roll out their vaccines against the coronavirus in India.The Centre last.