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According to the European Medicines Agency (EMA), as of 28 March 2021, the reported number of cases of embolic and thrombotic events after vaccination is lower than the rate of such events in the general population overall. However, the specific syndrome - of embolic and thrombotic events in combination with low levels of blood platelets ...
Cause. SIRVA is caused by improper insertion of the needle used in injections. It is "a preventable occurrence caused by the injection of a vaccine into the shoulder capsule rather than the deltoid muscle. As a result, inflammation of the shoulder structures causes patients to experience pain, a decreased range of motion, and a decreased ...
Pfeiffer syndrome is a rare genetic disorder, characterized by the premature fusion of certain bones of the skull ( craniosynostosis ), which affects the shape of the head and face. The syndrome includes abnormalities of the hands and feet, such as wide and deviated thumbs and big toes. Pfeiffer syndrome is caused by mutations in the fibroblast ...
Vaccine-associated enhanced respiratory disease (VAERD), or simply enhanced respiratory disease (ERD), is an adverse event where an exacerbated course of respiratory disease occurs with higher incidence in the vaccinated population than in the control group. It is a barrier against vaccine development that can lead to its failure.
Tinnitus, or ringing in the ears, has been linked to Covid vaccines. The CDC says there's no clear evidence, but researchers point to emerging theories. New theories of possible link between Covid ...
The Pfizer–BioNTech COVID-19 vaccine, sold under the brand name Comirnaty, [2] [32] is an mRNA-based COVID-19 vaccine developed by the German biotechnology company BioNTech. For its development, BioNTech collaborated with the American company Pfizer to carry out clinical trials, logistics, and manufacturing. [44] [45] It is authorized for use ...
Antibody-dependent enhancement ( ADE ), sometimes less precisely called immune enhancement or disease enhancement, is a phenomenon in which binding of a virus to suboptimal antibodies enhances its entry into host cells, followed by its replication. [1] [2] The suboptimal antibodies can result from natural infection or from vaccination.
Effect of neutralizing antibodies. One study found that the in vitro concentration ( titer) of neutralizing antibodies elicited by a COVID-19 vaccine is a strong correlate of immune protection. The relationship between protection and neutralizing activity is nonlinear.