Federal health officials are expressing concern about the effectiveness of AstraZeneca's COVID vaccine.
The drugmaker's data is under scrutiny, creating a potential setback for a fourth vaccine in the United States; Natalie Brand reports for CBS2.
Vaccine hesitancy might pose threat to efforts for ending COVID-19 pandemic
ANI
The findings of a recent study suggested that even though the demand for COVID-19 vaccines currently seems to be high, hesitancy..
