A man who received the Moderna Covid vaccine says he developed blood clots that he feared would kill him.
Jeff Johnson’s claims have dragged the Massachusetts-based company into an ongoing health scare that has already engulfed rival vaccine makers Johnson & Johnson and AstraZeneca.
Scientists have yet to establish a strong link between new Covid vaccines and blood clots.
Johnson, from Brighton, ended up in the emergency room after experiencing pain and swelling in his left leg, KDVR reported.
She was diagnosed with deep vein thrombosis (DVT), which is when a clot forms in a vein deep in the body, such as in the thigh or leg.
Jeff Johnson, 49 (pictured), of Brighton, Colo., Had blood clots in his leg a week after receiving the Moderna coronavirus vaccine at Salud Family Health Centers
According to Johnson, his doctor said it was possible the blood clot, known as deep vein thrombosis, was caused by the Moderna vaccine. Pictured: A vial of the Moderna COVID-19 vaccine in New York City, April 2021
Although these clots are different from those seen in patients who received the Johnson & Johnson vaccine, the 49-year-old said he was afraid of dying.
Johnson told KDVR he received the Moderna vaccine at Salud Family Health Centers in Brighton, where he lives.
There were no problems until about a week later, when he started to experience swelling, pain and tenderness in his left leg.
“I was worried, of course. I know the blood clots are bad and I was afraid of dying, ”he told the station.
When Johnson went to the emergency room, doctors found two blood clots in his left leg and was told he had DVT.
DVT occurs when a blood clot forms in one or more deep veins in the body, usually the legs.
J & J’s vaccine has been suspended in the United States after nine people – two in clinical trials and seven after vaccine approval – developed rare but serious blood clots in the brain over more than 7 million vaccinations .
About half of people have no symptoms, but those who experience pain, swelling, red or discolored skin, or a feeling of warmth in the affected leg.
The cumulative probability of developing DVT in a lifetime ranges from 2% to 5%, and the chances of dying are less than 0.01%.
Johnson told KDVR his doctor said the clots could have been caused by the Moderna vaccine, but there is no evidence.
The 49-year-old said he became more concerned after hearing about bleeding problems from the J&J vaccine.
The clots associated with the J&J injection are different, however, and are called cerebral venous sinus thrombosis (CVST).
CVST is a rare type of blood clot that blocks the sinus channels in the brain to drain blood, which can cause bleeding.
So, so far, nine patients – two in clinical trials and seven after vaccine approval – have developed the clot, one of whom has died and two are in critical condition.
This led the Centers for Disease Control and Prevention (CDC) and the United States Food and Drug Administration (FDA) to recommend Tuesday that the rollout of the J&J vaccine be put on hold until more data can be collected.
Dr Pradeep Dhar, The vice president of medical services at Salud, where Johnson was vaccinated, told KDVR that CVST was not linked to the Moderna vaccine.
He added that he had only seen three reports of people developing clots like the ones Johnson experienced after vaccination on at least 18 million appointments, and recommends that everyone get the shot.
“The risk of getting COVID infection and complications is much higher than the risk of having a clot with any vaccination,” Dhar said.
Earlier today, the Wall Street Journal revealed that AstraZeneca and Johnson & Johnson invited Moderna and Pfizer, who also make a Covid vaccine, to a joint study to investigate a possible link between vaccines and blood clots.
Moderna and Pfizer refused to do so. The study later found that people who receive Covid are eight to 10 times more likely to suffer from blood clots than those who have completed their vaccine.