{"id":14708,"date":"2025-07-31T18:45:32","date_gmt":"2025-07-31T23:45:32","guid":{"rendered":"https:\/\/www.voicesforvaccines.org\/?post_type=jtf_topics&p=14708"},"modified":"2025-07-31T18:45:32","modified_gmt":"2025-07-31T23:45:32","slug":"are-covid-vaccines-causing-more-blood-clots","status":"publish","type":"jtf_topics","link":"https:\/\/www.voicesforvaccines.org\/es\/jtf_topics\/are-covid-vaccines-causing-more-blood-clots\/","title":{"rendered":"Are COVID vaccines causing more blood clots?"},"content":{"rendered":"
[vc_row source=”” text=”Clinical Trials” font_container=”tag:h2|text_align:left” use_theme_fonts=”yes” google_fonts=”font_family:Abril%20Fatface%3Aregular|font_style:400%20regular%3A400%3Anormal” link=”” css=”.vc_custom_1708910874436{border-top-width: 1px !important;border-right-width: 1px !important;border-bottom-width: 1px !important;border-left-width: 1px !important;}”][vc_column][vc_row_inner][vc_column_inner][vc_custom_heading text=”The Claim:” font_container=”tag:h3|text_align:left” use_theme_fonts=”yes”][vc_column_text css=””]A new\u00a0study<\/a>\u00a0authored in part by Peter McCullough\u00a0claims<\/a>\u00a0that COVID vaccines are linked to a much higher number of dangerous brain blood clots compared to flu shots and other vaccines, especially in women.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner][vc_column_inner][vc_custom_heading text=”The Facts:” font_container=”tag:h3|text_align:left” use_theme_fonts=”yes”][vc_column_text css=””]The study called \u201cCOVID-19 Vaccines: A Risk Factor for Cerebral Thrombotic Syndromes\u201d makes some scary claims about how safe the vaccines are. But the way the study was done has serious problems that make its results unreliable.<\/p>\n

One big problem lies in how the study uses information from\u00a0VAERS<\/a>, a system where people can report health problems that happen after getting a vaccine. VAERS stands for Vaccine Adverse Event Reporting System, and it\u2019s managed by two government agencies: the CDC\u00a0and the FDA .<\/p>\n

However, VAERS is open to anyone, which means anyone can report a health issue after a vaccine, even if the vaccine didn\u2019t actually cause the problem. For example, if someone got a vaccine and then got a headache the next day, they could report it to VAERS, even though the headache might have had nothing to do with the shot. The VAERS website even warns that these reports don\u2019t prove the vaccine was the cause.<\/p>\n

Because of this, using VAERS as the main source for a scientific study can lead to false conclusions. Just because two things happen around the same time doesn\u2019t mean one caused the other.<\/p>\n

The\u00a0website’s<\/a>\u00a0most important warning puts the\u00a0above claims into context:\u00a0“VAERS\u00a0reports may contain information that is incomplete, inaccurate, coincidental, or unverifiable.\u00a0<\/strong>Reports to\u00a0VAERS\u00a0can also be biased. As a result, there are limitations on how\u00a0the\u00a0data can be used scientifically. Data from\u00a0VAERS\u00a0reports should always be interpreted with these limitations in mind.”<\/p>\n

The study also uses something called\u00a0Proportional Reporting Ratios<\/a>\u00a0(PRRs) the wrong way. PRRs are a kind of math comparison. They look at how often a specific side effect is reported for one vaccine compared to another, based on reports sent to systems like VAERS.<\/p>\n

In this study, the authors calculated really high PRRs\u2014like 1120 for COVID-19 vaccines compared to flu vaccines\u2014and said this shows the COVID-19 vaccines are much more dangerous.<\/p>\n

But that\u2019s not how PRRs work. PRRs do not tell us how often something actually happens in real life. They only look at what\u2019s been reported, and reporting can vary a lot depending on how much attention a vaccine is getting in the news or online.<\/p>\n

Because of these limitations, PRRs shouldn\u2019t be used to say that one vaccine is riskier than another. It\u2019s\u00a0like measuring how scary two movies are by counting how many people posted about being scared without knowing how many actually watched each movie.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row]\n<\/div>","protected":false},"excerpt":{"rendered":"

A flawed study misuses VAERS data to claim COVID vaccines cause more brain clots, but experts say these reports don’t prove cause or reflect true risk.<\/p>\n","protected":false},"parent":0,"template":"","jtf_topic_subjects":[189,188,218],"class_list":["post-14708","jtf_topics","type-jtf_topics","status-publish","hentry","jtf_topic_subjects-covid-19","jtf_topic_subjects-mrna-vaccines","jtf_topic_subjects-vaccine-safety","entry","no-media"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.voicesforvaccines.org\/es\/wp-json\/wp\/v2\/jtf_topics\/14708","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.voicesforvaccines.org\/es\/wp-json\/wp\/v2\/jtf_topics"}],"about":[{"href":"https:\/\/www.voicesforvaccines.org\/es\/wp-json\/wp\/v2\/types\/jtf_topics"}],"version-history":[{"count":1,"href":"https:\/\/www.voicesforvaccines.org\/es\/wp-json\/wp\/v2\/jtf_topics\/14708\/revisions"}],"predecessor-version":[{"id":14725,"href":"https:\/\/www.voicesforvaccines.org\/es\/wp-json\/wp\/v2\/jtf_topics\/14708\/revisions\/14725"}],"wp:attachment":[{"href":"https:\/\/www.voicesforvaccines.org\/es\/wp-json\/wp\/v2\/media?parent=14708"}],"wp:term":[{"taxonomy":"jtf_topic_subjects","embeddable":true,"href":"https:\/\/www.voicesforvaccines.org\/es\/wp-json\/wp\/v2\/jtf_topic_subjects?post=14708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}