Covid vaccines have been linked to significant increases in heart, blood and neurological disorders, according to the largest global study of its kind to date. The Mail has more.

An international coalition of vaccine experts looked for 13 medical conditions among 99 million vaccine recipients across eight countries in order to identify higher rates of those conditions after receiving the shots.

They confirmed that the shots made by Pfizer, Moderna, and AstraZeneca are linked to significantly higher risk of five medical conditions – including a nerve-wasting condition that leaves people struggling to walk or think.

But the study also warned of several other disorders that they said warranted further investigation, including the links between a brain-swelling condition and Moderna’s shot.

Still, the team says the absolute risk of developing any one of the condition remains small. For instance, 13 billion doses of vaccines have been administered and there have only been 2,000 cases of all conditions. …

Meanwhile, the study also confirmed a threefold higher risk for a type of heart inflammation called myocarditis, though researchers did not give the number of expected cases versus actual cases.

Myocarditis was seen most commonly in young men. It’s believed to be related to immune response triggered my the mRNA vaccines by Pfizer and Moderna, which work by instructing cells to produce the same protein that sits atop the coronavirus. 

This prompts the immune system to produce antibodies against the spike protein, providing protection against Covid. In rare cases, this immune response may lead to inflammation in the heart muscle. …

There was a greater than 3.7 times risk of a condition called Acute Disseminated Encephalomyelitis (ADEM), which causes swelling in the brain and spinal cord that damages the protective covering of nerve fibers in the brain and spinal cord, after the first dose of the Moderna vaccine. …