The Swadeshi Jagran Manch (SJM) also demanded that more companies should be allowed to manufacture the vaccines to ensure "availability and affordability".
In her second letter to Modi in a week on the Centre's inoculation policy, Banerjee also said that manufacturers should not do business with vaccines at this hour of crisis.
Bengal polls: Modi govt has enough money but won't provide vaccines free of cost, says Mamata at rally
Banerjee urged voters to rise above religious differences and "prevent divisive forces such as the BJP to gain a strong foothold in Bengal -- which is the land of Tagore, Nazrul and other luminaries".
Mocking the BJP over its slogan of 'One nation, one party, one leader', she stressed that every Indian needs vaccine free of cost, regardless of their age and location.