Are Pfizer and Moderna Trying to Boost Sales With an Early COVID Booster Shot?

Are Pfizer and Moderna Trying to Boost Sales With an Early COVID Booster Shot?

Source: 
Motley Fool
snippet: 

Pfizer and Moderna are both testing booster doses of their vaccines. The two drugmakers are also now stating publicly that a third dose will likely be needed within less than a year after the second dose of their vaccines. But are Pfizer and Moderna really just trying to boost sales with an early COVID-19 booster dose?