Tag Archives: Vaccine induced blood clots

Welcome to the world of the physician

In a sense, the uncertainty about hematologic complications of the pandemic vaccines is good in that it is a real teaching moment for the public about what docs confront every day — balancing risk vs. reward. 

No drug is without side effects.  No surgery is without complications.  It is good to see the public  wrestle with these things.  

For a very good explanation of what those complications are and the risks and rewards of taking the vaccines please see — 


Even more interesting are the 139 comments found at the end of  the article.  Some are from experts, some are from frightened lay people; as always there are people with an ax to grind.  As is usually the case in medicine, the data are not clear cut and sometimes contradictory.  As is always the case more data would be helpful, is desired and rarely available.  What is particularly interesting to me is the way some very knowledgable people wrestle with the data, interpreting the same data differently.  Welcome to the real world. 

On a more positive note, a friend who teaches at Hopkins sent me the a copy of the eMail below, with permission to share it.  This provides lots of excellent data on the protective effects of vaccination in a  group of people with a fairly high risk of exposure to the virus,  working at a major medical center where lots of very sick COVID-19 patients are being treated. 

35,000 were vaccinated.  Nonetheless 51 became infected at a time of maximum protection (5 weeks or more after the first shot), demonstrating that the vaccine isn’t 100% protective.  But no one ever claimed that it was.

 But only 2 of the 51 required hospitalization.  So the vaccine is effective in preventing serious illness from the virus (2/35,000).  So who cares if the other 49 had the symptoms of the flu.  They don’t and you shouldn’t.  The number of hematologic complications wasn’t stated. There were two at most, as they always result in hospitalization.  

To the Johns Hopkins Medicine community


Dear Colleagues,


As we continue to monitor COVID-19 infection and vaccination trends at Johns Hopkins Medicine (JHM), we want to share some data about the incidence of infection among JHM personnel following partial and full vaccination.


You are considered fully vaccinated, per the Centers for Disease Control and Prevention, two weeks or more after receiving the second dose of a two-dose COVID-19 vaccine regimen and two weeks or more after receiving a one-dose COVID-19 vaccine regimen. This is when the body has had a chance to produce the antibodies and immune response that protect against infection. Before this time, if you have started the vaccination series, you are considered partially vaccinated and you do not yet have the full amount of protection the vaccination provides against infection. While full vaccination has been found to be highly effective at preventing COVID-19, infection (the incidence is very low) is still possible even after being fully vaccinated.


We are monitoring the situation to determine how often infection seems to occur after partial or full vaccination, and the severity of those infections.


As of April 12, 2021, of the nearly 35,000 employees who were fully vaccinated (14 days or more after a second dose), 51 employees (0.14% of those who have been fully vaccinated) had tested positive for COVID-19. This demonstrates that SARS-CoV-2 infection is possible even after full vaccination, and it highlights the importance of continuing to practice basic infection prevention precautions after full vaccination. The good news is that acquiring COVID-19 after full vaccination appears to be relatively rare and, among these 51 cases, only two were severe enough to require hospitalization. This shows that the COVID-19 vaccine is highly protective against severe disease, hospitalization and death. If you have not yet been vaccinated, please schedule your appointment as soon as you can to protect yourself and others.