A GP from Hampshire posted the following on Facebook.
You’ll see you were actually at more risk of developing blood clots when you were pregnant but I doubt it was something you were terrified about then.
“ Some thoughts on the AstraZeneca Vaccine:
Up to and including 31 March 2021, the MHRA had received 79 UK reports of blood clotting cases alongside low levels of platelets (thrombosis associated with thrombocytopenia) following the use of the COVID-19 Vaccine AstraZeneca
• 44 of the 79 cases were of cerebral venous sinus thrombosis (CVST) with thrombocytopenia
• 35 of the 79 cases were of thrombosis in other major veins (e.g. splenic) with thrombocytopenia
• ALL 79 cases occurred after a FIRST dose of the vaccine
Sadly, 19 people have died out of the 79 cases
• 11 out of the 19 people who died were under the age of 50
• 3 out of the 19 people who died were under the age of 30
The overall risk of such an event, thrombosis associated with thrombocytopenia following a first dose of AZ vaccine, is:
• 4 in a million
• that's 0.0004 %
The overall risk of death due to that event is:
• 1 in a million
• that's 0.0001 %
If you're under 50, the risk of death drops to:
• 1 in 2 million
• that's 0.00005 %
If you're under 30, the risk of death drops even further, to:
• 1 in 8 million
• that's 0.00001 %
To put that into perspective.
The risk of developing a blood clot on an aeroplane flight lasting more than 4hrs is:
▪️ 1 in 6000
▪️ that's a 167 in a million risk
▪️ or 0.0167%
The risk of developing a blood clot whilst taking the combined oral contraceptive pill is:
▪️ 1 in 2000
▪️ that's a 500 in a million risk
▪️ or 0.05%
The risk of a DVT or PE developing during pregnancy is:
▪️ 2 in 1000
▪️ that's a 2000 in a million risk
▪️ or 0.2%
What happens if you develop COVID-19?
• Pulmonary embolism, or clotting on the lungs, occurs in 7.8% of people who have COVID-19
• Deep vein thrombosis (DVT), or clotting in the legs, occurs in 11.2% of people who have COVID-19
• Of those who have COVID-19 and end up in an intensive therapy unit (ITU), 23% will have some form of clot
• COVID-19 causes strokes in 1.6% of people
• Up to 30% of people who have COVID-19 will get thrombocytopenia (a lowering of the platelet count)
The risk of clots and lower platelets, ending up in hospital, and of course death, is much higher with COVID-19 than these extremely rare events which are occurring with the vaccine.
At the current time (see picture), the risk-benefit ratio for anyone aged 30+ remains overwhelmingly in favour of having the AZ vaccine, as soon as it is offered to you, rather than delaying vaccination (until an alternative one is available AND offered to you) and so running the risk of developing COVID-19 in the meantime - a situation that carries a far, far greater risk of illness and death.
A history of previous venous (DVT/PE) or arterial thrombosis, unless associated with receiving a vaccine, is NOT a contraindication to receiving the AZ vaccine. There are no known (or apparent) risk factors for this very rare event, it appears to be an idiosyncratic immune phenomenon.
Addendum: Administration of the COVID-19 Vaccine AstraZeneca in patients with a history of:
• cerebral venous sinus thrombosis
• acquired or hereditary thrombophilia
• heparin-induced thrombocytopenia
• antiphospholipid syndrome
should only be considered when the potential benefit outweighs any potential risks.
assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/976880/PHE_COVID-19_AZ_vaccination_guide.pdf”