In late 2021, some customers took to social media to say that COVID-19 vaccines modified the colour of human blood. A number of iterations of the allegation have been current on social media and, as fact-checkers at USA Today, The Associated Press, and AFP beforehand reported, it seems to have originated in a Sept. 17 Instagram post:
“Left vs. Right= non vax vs. VAX,” learn the put up, which additionally featured two luggage of what gave the impression to be otherwise red-hued luggage of blood that regarded “like a bag of blood clots.”
That is false. In an e-mail to Snopes, the American Pink Cross mentioned that the declare was “simply untrue.”
“There is no substance to the claim that COVID-19 vaccine changes the color of blood. At the American Red Cross, we visually inspect all donated units and have not seen that COVID-19 vaccinated blood units change the color of blood,” wrote spokesperson Kate Wilkes,
Blood in human veins is all the time purple, by no means blue, although it may well typically look blue via our pores and skin — an optical phantasm that happens as a result of blue mild doesn’t penetrate as far into tissue as purple mild. If a blood vessel is deep sufficient, the eyes see extra blue than purple mild mirrored as a result of of how the blood absorbs purple wavelengths. (Blue blood does exist in the pure world — for example, in horseshoe crabs.)
However the hue of blood can range naturally as a result of of the method blood interacts with oxygen. A protein known as hemoglobin, which incorporates a red-colored compound heme, is chargeable for carrying oxygen via the blood stream. As The Conversation, a nonprofit information group, reported beforehand, heme incorporates an iron atom that binds to oxygen and transports from the lungs and all through the physique. When oxygen is certain to its iron, blood can flip a brilliant, sweet apple purple. With out oxygen, it seems as a darker red color.
Minor variations in particular person ranges of bilirubin, an orange-yellow pigment associated to purple blood cells, oxygen, iron, lipids and purple blood cell rely, amongst different elements, can contribute to adjustments in blood colour, added Wilkes.
However there isn’t any recognized occasion the place a COVID-19 vaccine modified the hue or colour of blood.
“A donor’s immune response is not impacted by giving blood. Donating blood after receiving a COVID-19 vaccine does not reduce a donor’s protection from the virus. Similar to other vaccines such as measles, mumps or influenza, the COVID-19 vaccine is designed to generate an immune response to help protect an individual from illness,” mentioned Wilkes.
That’s backed up by a June 2021 research printed in the peer-reviewed journal Transfusion, which decided that present donor screening tips are acceptable in mild of the pandemic. These tips don’t require testing samples for SARS-CoV-2 virus however do require that donors be screened for signs of COVID-19 and different infections.
“This finding is good news for thousands of patients who may need a blood transfusion because of surgery or a disease that causes anemia, such as a rare blood-related condition or leukemia,” mentioned Dr. Simone Glynn, research writer and chief of the Blood Epidemiology and Medical Therapeutics Department at the Nationwide Coronary heart, Lung, and Blood Institute, in a news release.
At the time of this writing, the Pink Cross mentioned that there’s an emergency need for blood and platelets and the Pink Cross warns that such misinformation may probably deter individuals from donating lifesaving blood to assist hospitals and sufferers in want.
“Individuals who have received a COVID-19 vaccine are still eligible to donate blood and platelets. Knowing the name of the manufacturer of the vaccine they receive is important in determining blood donation eligibility. The Red Cross only collects blood from individuals who are healthy and feeling well at the time of donation,” wrote the group in a Sept. 27 statement.
Bakkour, Sonia, et al. “Minipool Testing for SARS-CoV-2 RNA in United States Blood Donors.” Transfusion, vol. 61, no. 8, 2021, pp. 2384–91. Wiley On-line Library, https://doi.org/10.1111/trf.16511.
Bilirubin Take a look at – Mayo Clinic. https://www.mayoclinic.org/tests-procedures/bilirubin/about/pac-20393041. Accessed 12 Oct. 2021.
“Blood In Your Veins Is Always Red, Not Blue.” Snopes.Com, https://www.snopes.com/news/2019/08/28/blood-in-your-veins-is-always-red-not-blue/. Accessed 12 Oct. 2021.
“Covid-19 Vaccines Do Not Affect Blood Color.” Reality Verify, 22 Sept. 2021, https://factcheck.afp.com/http%253A%252F%252Fdoc.afp.com%252F9NA6BT-1.
“COVID-19 Vaccines Do Not Change Color of Blood.” AP NEWS, 20 Sept. 2021, https://apnews.com/article/fact-checking-170435327923.
Emergency Blood Scarcity — Donor Turnout Reaches Lowest Ranges of the Yr amid Delta Variant Outbreak. https://www.redcross.org/about-us/news-and-events/press-release/2021/emergency-blood-shortage-donor-turnout-reaches-lowest-levels.html. Accessed 12 Oct. 2021.
https://www.redcross.org/about-us/news-and-events/press-release/2021/emergency-blood-shortage-donor-turnout-reaches-lowest-levels.html. Accessed 12 Oct. 2021.
“Fact Check: COVID-19 Vaccination Has No Effect on Blood Color.” USAToday, https://www.usatoday.com/story/news/factcheck/2021/09/26/fact-check-covid-19-vaccines-dont-change-blood-color/5821288001/. Accessed 12 Oct. 2021.
Reality Verify: There IS NOT A Seen Distinction Between The Blood Of Vaccinated And Unvaccinated Folks | Lead Tales. https://leadstories.com/hoax-alert/2021/10/fact-check-there-is-not-a-visible-difference-between-the-blood-of-vaccinate-and-unvaccinated-people.html. Accessed 12 Oct. 2021.
“Is Horseshoe Crab Blood Required for COVID-19 Vaccines?” Snopes.Com, https://www.snopes.com/fact-check/horseshoe-crab-blood-covid-vaccine/. Accessed 12 Oct. 2021.
“U.S. Blood Donations Are Safe under Current COVID-19 Screening Guidelines.” Nationwide Institutes of Well being (NIH), 1 June 2021, https://www.nih.gov/news-events/news-releases/us-blood-donations-are-safe-under-current-covid-19-screening-guidelines.