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@patandpaula

I had the 2nd Moderna vaccination and nine days later developed GCA. After ten weeks I had the Covid antibody test and it showed ZERO. So I assume I am not protected

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Replies to "I had the 2nd Moderna vaccination and nine days later developed GCA. After ten weeks I..."

I'm very sorry you had a bad response to the Moderna vaccine and I hope you are feeling better. Here is an excerpt from the FDA guidance about antibody tests.
Date Issued: May 19, 2021

The U.S. Food and Drug Administration (FDA) is reminding the public and health care providers that results from currently authorized SARS-CoV-2 antibody tests should not be used to evaluate a person’s level of immunity or protection from COVID-19 at any time, and especially after the person received a COVID-19 vaccination.

I hope this helps to reassure you that the vaccine can bestow protection regardless of the results of an antibody test. The CDC has issued similar guidance regarding the Covid vaccine and antibody tests. Please stay safe and well.