Pfizer says it is developing a Covid booster shot to target the highly transmissible delta variant

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10. My son is in the Pfzier booster trial

My son was in the original Pfzier trial and received his vaccinations back in August of last year. He got the real vaccine and was asked to participate in this trial. This is the regular pfzier vaccine. My son thinks that he got the vaccine in that he ran a fever for two or three days and his arm still hurt some. These are slightly more severe compared the side effects he felt for his second shot

This is the regular pfzier vaccine. My son is not supposed to go back for blood work until Feb. which is strange to me.

Last time my son did an antibody test to see if he was in the vaccine group and not the control group. He is thinking about doing this again