A rare side effect of vaccination

The National Vaccine Injury Compensation Program (VICP) provides financial compensation to people who suffer from serious side effects listed in its vaccine injury chart.

In 2017, vaccination-associated shoulder injury (SIRVA) was added to the table of vaccine-related injuries based on compelling evidence of a causal relationship between vaccination and bursitis. deltoid muscle. In addition to bursitis, other shoulder conditions have been implicated in vaccination.

The proposed mechanism is that shoulder conditions are caused by immune responses when vaccines are injected into the shoulder joint, rather than the deltoid muscle. However, epidemiological data on shoulder status after vaccination are limited.

Researchers from the Kaiser Permanente Southern California Department of Research & Evaluation studied the health records of more than 3.7 million immunizations during the study period to estimate the risk of post-implantation shoulder diseases. vaccination and assessment of possible risk factors.

A natural language processing (NLP) algorithm was used to identify potential shoulder conditions in immunized individuals with a shoulder disorder diagnostic code and characteristics of the vaccinated individuals. and absence of shoulder disease were compared.

Of the more than 3.7 million immunizations performed, 371 cases of shoulder disease have been identified, with an estimated incidence of 0.99 per 10,000 immunizations in adults.

The incidence is even less for pediatric patients, with only 4 cases of shoulder diseases out of more than 750,000 vaccinations.

The researchers also looked at risk factors for developing the condition of the shoulder and found that in adults, older age, and female sex, the number of outpatient visits increased in the six months before vaccination, with fewer outpatient visits. Comorbidities and pneumococcal conjugate vaccination are associated with higher morbidity than risk for shoulder conditions.

Among flu vaccines, the quadrivalent vaccine is associated with an increased risk of shoulder diseases. Concomitant use of vaccines is associated with a higher risk of shoulder diseases in the elderly.

Source: Eurekalert

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