Cannabidiol for augmenting vaccine mediated immunity and prophylaxis of covid-19

The present invention relates to a pharmaceutical composition comprising therapeutically effective amount of Cannabidiol for administration with a Covid-19 vaccine to a mammal / human to sustain and / or enhance effect of vaccine. Further the invention relates to methods to sustain and / or enhance effect of a Covid-19 vaccine in a mammal / human by administering to such a mammal / human a pharmaceutical composition comprising a therapeutically effective amount of Cannabidiol with a Covid-19 vaccine. Administration of Cannabidiol with vaccine can be of following types: i) before administering Covid-19 vaccine; or ii) along with Covid-19 vaccine; or iii) after administering Covid-19 vaccine; or iv) any combination of i, ii and iii including before, along with and after administering Covid-19 vaccine.