Manufacturing capacity is going to be a big constraint this year, but surely whatever factory was going to make the old variant, could equally well make some ne

Manufacturing capacity is going to be a big constraint this year, but surely whatever factory was going to make the old variant, could equally well make some new variant of the vaccine. Longer-term, if we need a new vaccine every 9 months, that doesn't sound like a huge manufacturing problem. We manufacture many high-tech things on a scale of 1 per person per year, like the flu vaccine. The difficulty is ramping up fast (especially when you think that demand may only last a year).