10 suspected cases of blood clot in brain among those who received Pfizer or Moderna Covid-19 vaccines in Singapore
newsare.net
SINGAPORE - There are 10 suspected cases of cerebral venous thrombosis (CVT), or blood clot in the brain, among those who have received the Pfizer and Moderna vaccines for Covid-19. CVT is a very rare type of blood clot occurring in the veins of the brain, w10 suspected cases of blood clot in brain among those who received Pfizer or Moderna Covid-19 vaccines in Singapore
SINGAPORE - There are 10 suspected cases of cerebral venous thrombosis (CVT), or blood clot in the brain, among those who have received the Pfizer and Moderna vaccines for Covid-19. CVT is a very rare type of blood clot occurring in the veins of the brain, which can happen naturally regardless of vaccination. There are risk factors and these include a medical history of blood clotting disorder, head trauma and the use of medications such as oral contraceptives and drugs for hormonal replacement therapy. The yearly background incidence rate of CVT in the general population is 1.3 to 2 in 100,000 people, said the Health Sciences Authority (HSA) in its fifth safety update of Covid-19 vaccines. Among the suspected cases of vaccine-related CVT, HSA noted that none was fatal. It also cannot be determined if there is an increased rate of CVT associated with the use of mRNA vaccines, said HSA. The authority is monitoring such occurrences closely and reviewing the reported cases with local expert panels, though it noted that no overseas regulators have identified CVT as a safety signal of mRNA vaccines. Read more