"In the TMPRSS2 gene we found that a specific genetic variation is more common in the COVID-19 patient", he said. This rains on the parade of the often-touted "herd immunity" method and increases the potential for multiple waves of COVID-19 outbreaks.
Underlying ill health, such as that caused by high blood pressure and diabetes, were also found to be a risk factor for coronavirus-linked strokes.
The researchers carried out a systematic review and analysis of published research into the link between Covid-19 and stroke, which allowed them to come to more robust conclusions than looking at just one study. Compared with traditional pre-clinical approaches, in which drugs are tested in cells from monkeys or from human cancer patients, these so-called organoids more faithfully mimic the complex cell types and structure of human tissues, according to Dr. Shuibing Chen and Dr. Robert Schwartz of Weill Cornell Medicine in NY.
Most commonly, the EEG test detected slowing or abnormal electrical discharge in the frontal lobe of the COVID-19 patients.
COVID-19 has become a global pandemic, affecting millions of people worldwide.
Confirmed cases in Switzerland and neighbouring Liechtenstein have surpassed 127,000, with a death toll above 1,900.
"And this is more likely to occur in older adults who have comorbidities, so exactly the type of people that were enrolling in our trial. We put the 2 tests together, and only people who show antibody production for both parts of the test are determined to be positive".
Healthcare workers account for 21.8% of all Covid-19 cases in Ireland.
Swiss hospitals are scrambling to cope with a surge in new COVID-19 patients, bringing back retired staff to replace sick frontline workers and closing other wards as officials warn they could reach breaking point in about 10 days. However, they noted that recovery patients can not donate blood until at least 14 days after their symptoms have subsided.
Out of 1,655 patients who had enough data to be analysed, 31.5 per cent died. Compared to a control group that hadn't been sick, the COVID patients performed worse. Through this process, the researchers discovered that the vaccinated cells produced more of several kinds of immune molecules that fight off pathogens than those that were initially left alone. One mechanism might be that the virus triggers an inflammatory response that causes thickening of the blood, increasing the risk of thrombosis and stroke. Notably, the investigators said most tests only analyze the S1 region of the SARS-CoV-2 virus. These blockages stem from three conditions: the formation of a clot within a blood vessel of the brain or neck, called thrombosis; the movement of a clot from another part of the body such as the heart to the brain, called embolism; or a severe narrowing of an artery in or leading to the brain, called stenosis.
Recent research suggests that the virus may cause a significant decrease in brain function and makes it age faster..
'The picture is complicated, ' said study author Dr Stefania Nannoni from the department of clinical neurosciences at the University of Cambridge.
For their research, the investigators first created a blood test to detect the SARS-CoV-2 antibodies.
'Secondly, we see a particular pattern of stroke in individuals with COVID-19, which suggests a causal relationship in at least a proportion of patients'. He said doctors evaluating COVID-19 patients need to bear in mind that GI symptoms may signal a markedly higher risk of a worsened disease course.