Coronavirus US: Vaccine trial participant fainted after injection

Ian Haydon, 29 (pictured), Seattle, Washington, is one of 45 people enrolled in Moderna Therapuetics’ coronavirus vaccine trial

A coronavirus vaccine trial participant says he suffered a serious adverse reaction after a dose, but still wants people to get the jab when it becomes available.

Ian Haydon, 29, from Seattle, Washington, is one of several people who was given an immunization developed by Moderna Therapeutics at Kaiser Permanente.

He told STAT News that his temperature shot up to 103F just 12 hours after his second dose was administered.

Then, after being released from an urgent care clinic, he fainted in his own home, but recovered within 24 hours.  

‘I understand that sharing the story, it’s going to be frightening to some people,’ he told STAT News. 

‘I hope that it doesn’t fuel any sort of general antagonism towards vaccines in general or towards even this vaccine.’ 

Haydon said that when he was given the first dose, he had slight arm pain and trouble lifting the limb beyond his shoulder, but he recovered within a few days.

After the second dose, he quickly developed arm pain 

At around 10pm – 10 hours after arriving home – Haydon developed chills and woke up with a fever.

His temperature climbed as high 103.2,  and Haydon felt sore and like he wanted to throw up, STAT News reported.

After his second dose, he experienced arm pain and, later that night, developed a fever of 103.2F. Pictured: Neal Browning receives a shot in the first-stage safety study clinical trial of Moderna's potential vaccine for COVID-19, March 16

After his second dose, he experienced arm pain and, later that night, developed a fever of 103.2F. Pictured: Neal Browning receives a shot in the first-stage safety study clinical trial of Moderna’s potential vaccine for COVID-19, March 16

Following his visit to urgent care, Haydon threw up and then passed out, but recovered within a few days. Pictured: Moderna Therapeutics headquarters in Cambridge, MA, May 18

Following his visit to urgent care, Haydon threw up and then passed out, but recovered within a few days. Pictured: Moderna Therapeutics headquarters in Cambridge, MA, May 18

His girlfriend called the 24-hour hotline that Kaiser gave him, and she was told to take him to urgent care.

The pair arrived at 5am, where they stayed for about an hour. Haydon was given Tylenol and doctors recommended he go to a nearby hospital, but he wanted to go home.  

After sleeping for five hours, Haydon woke up with a fever of 101.5F. He went to the bathroom where  he vomited and subsequently fainted.

His girlfriend called the clinic, who told her that Haydon should go back to urgent care or call 911.

However, after a few hours of lying on the couch, drinking sports drinks and with a wet towel on his forehead, his fever broke, according to STAT News.

Within a few days, he felt back to normal. 

Haydon is one of 45 total participants in Moderna’s vaccine trial and one of four who suffered serious but non-life threatening adverse reactions.

Few details have been released regarding theincidents but Moderna did say that three, participants, including Haydon, received the highest dose possible and had adverse reactions that after their entire bodies.

The fourth person was given a lower dose and developed a rash where the vaccine was administered.

Haydon says although he felt sick during the ordeal, he doesn’t regret enrolling in the study nor does he fear of suffering from long-term complications. 

He says researchers are taking precautions and this phase, Phase I, is to figure out what the proper dose for humans is so that that develop antibodies but not side effects.  

‘As we rush to get a vaccine developed as quickly as possible, the reality of vaccine development is that it can only be rushed so much and the trial still needs to take place,’ he told STAT News.

‘They have to move at the speed they move at. And stories like what happened to me, they matter because they shape the approval process.’

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