Adjuvants may be added to a vaccine to produce more antibodies and longer lasting immunity thus minimising the dose of antigen needed.
'In case of shortage of other raw material, like filters and bags, one can try to develop another vendor. However, for chemicals as critical as adjuvants, this is not possible'
The NIH said results of two studies of blood serum from people who had received Covaxin suggest that the vaccine generates antibodies that effectively neutralise the B.1.1.7 (Alpha) and B.1.617 (Delta) variants of SARS-CoV-2, first identified in the United Kingdom and India, respectively.
'The US has invoked the Defence Act and banned export of raw materials.' 'This is as good as banning vaccines.'
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