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Johns Hopkins University found only 54% of fully vaccinated organ transplant recipients developed antibodies.
CANDIDA MOSS: I remember getting my test results at 4:00 in the morning and excitedly rushing to check them. And being just devastated to learn that the vaccine had produced no immune response in me at all.
KATHERINE BIEK: As a kidney transplant recipient, Candida Moss is at a high risk of catching COVID-19, so she rushed out to get vaccinated the first chance she could. But a test taken weeks after her second dose showed Moss' body never developed the necessary antibodies to protect her from the coronavirus.
CANDIDA MOSS: It's very scary and it's very difficult for me to know, how do I navigate the world? Now, everyone's wandering around without masks on.
KATHERINE BIEK: Moss isn't alone. A team at Johns Hopkins University found only 54% of fully vaccinated organ transplant recipients had antibodies. And those antibody levels were all lower than those measured in the general population.
DORRY SEGEV: We expected a decrease, but we didn't expect this huge deficiency in the ability of transplant patients to respond.
KATHERINE BIEK: Dr. Dorry Segev, one of the authors of the study, told Newsy that lack of immunity largely has to do with a class of immunosuppressive medication that patients like Moss have to take to prevent rejection.
DORRY SEGEV: We have to block the immune system from attacking the organ. That same immune system would be the immune system that gets activated when you give a vaccine. And now, that immune system is blocked.
KATHERINE BIEK: Over 700,000 organ transplants have taken place in the US since 1988. And Dr. Segev says another 10 million Americans with autoimmune diseases, like rheumatoid arthritis, lupus, or Crohn's disease, take these kinds of anti-metabolite drugs. More long term research is needed to determine how well the immunocompromised will be protected against COVID since they were largely excluded from initial vaccine trials.
In the meantime, Sally Satel, who also has a donated kidney, plans to get a third dose.
SALLY SATEL: If there were a shortage of vaccines I would never do such a thing. But there's some evidence that a third may produce some immune response.
KATHERINE BIEK: Despite the research, Dr. Segev recommends transplant patients still get vaccinated. But he says they need to remain realistic about the risks.
DORRY SEGEV: This is not the time for transplant patients to be celebrating their freedom because of the vaccine. This is the time where transplant patients should still be wearing masks, social distancing, being careful.
KATHERINE BIEK: Because of that, Moss and Satel both said the general population needs to do its part to help.
CANDIDA MOSS: For those of us for whom the vaccine didn't work, it's devastating to not know when this will be over for us. And to no longer have the support of the rest of society in protecting ourselves.
SALLY SATEL: You know, I'm not asking you for an organ, we're just asking you to-- you know, would you consider being vaccinated. Because it would be a great act of charity to people like me.
KATHERINE BIEK: For Newsy, I'm Katherine Biek.