Pfizer sees COVID-19 as 'durable' revenue stream

Empty "optimism", there is no reason to believe there will be need for boosters of the vaccine, much less a constant revenue for any single company. Relatively simple methods have resulted in good enough vaccines that would replace the "best" ones once the acute need of immunization passes. And comparing it with influenza is nonsense, SARS-CoV-2 only has one sertotype and all vaccines until now have been still useful against the new variants. There is no data until now that would demonstrate immunity is short lived, much less as short as 6 months.

At the end is just wishful thinking, the company got a chance and did fine developing a good vaccine, maybe too good to squeeze profits. Without a huge improvement (intranasal application?) their role will be finished and it will be the turn of the cheapest options that still work.