Pasadena, CA - October 12: Tracy Gage, LVN, prepares a syringe at a flu and COVID vaccination clinic Kaiser Permanente Pasadena on Thursday, Oct. 12, 2023, in Pasadena, CA. (Francine Orr / Los Angeles ...
For decades, the flu virus in the shots you’re offered every fall has been grown in chicken eggs. While that may sound odd, the tried-and-true technology has been around since the 1940s. Now, ...
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