Pfizer and its German partner BioNTech pledged on Friday to deliver 1 billion doses of their coronavirus vaccine to poorer nations this year and another 1 billion next year, the boss of Pfizer announced."Pfizer and BioNTech are pledging to provide 2 billion doses of our Covid-19 vaccines to middle- and low-income countries over the next 18 months," Albert Bourla said at a global health summit.Meanwhile, Pfizer and the Indian government are at loggerheads over a demand by the US drugmaker for legal protection from any claims linked to the use of its Covid-19 vaccine.India has not given any manufacturer of a Covid-19 vaccine indemnity against the costs of compensation for any severe side effects, which is a condition Pfizer has obtained in.