10 Suspected Cases of Blood Clot in Brain Among Those Who Received mRNA Covid-19 Vaccines in S’pore

• 10 Suspected Cases of Blood Clot in Brain Among Those Who Received mRNA Covid-19 Vaccines in S’pore
  by Cheryl Tan, https://www.straitstimes.com/
  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 in Singapore.
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  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.
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  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.
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