Pfizer-BioNTech’s vaccine launch encountered a number of problems during the first few days, US officials said. A problem, caused by storing the vaccine at temperatures below minus 70 degrees Celsius, has forced officials to replace vaccine doses in California, officials said. Pfizer has reported to the US government that it has experienced some unnamed manufacturing and manufacturing challenges, according to US Secretary of Health and Human Services Alex Azar. Azar said his department will assist manufacturers in creating and distributing the vaccine. “We will make sure that, by whatever mechanism, we will provide them with full support to ensure they can produce for the American people,” Azar said.
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