COVID-19 vaccination and involuntary movements: A longitudinal panel study

Area of Science:

• Public Health
• Epidemiology
• Vaccinology

Background:

• Concerns exist regarding potential adverse events following COVID-19 vaccination, including involuntary movements.
• Previous case studies suggested a link, but systematic research was lacking.

Purpose of the Study:

• To investigate the association between COVID-19 vaccination and the occurrence of involuntary movements.
• To systematically evaluate vaccine safety concerning neurological adverse events.

Main Methods:

• Longitudinal panel study design utilizing data from the BiCoVac cohort.
• Involved 97,537 unique Danish individuals (aged 16-65) with 165,834 responses.
• Data collected via questionnaires and national registers; analyzed using mixed effects logistic regression.

Main Results:

• Vaccinated individuals exhibited lower odds of reporting involuntary movements compared to unvaccinated individuals.
• Adjusted analyses maintained a consistent pattern of reduced odds for vaccinated groups.
• Strongest associations observed within 4 weeks post-first dose (OR=0.72) and >4 weeks post-second dose (OR=0.77).

Conclusions:

• The study does not support involuntary movements as an adverse reaction to COVID-19 vaccination.
• Findings reinforce the safety profile of COVID-19 vaccines concerning involuntary movements.
• Results aim to enhance public confidence in vaccination programs.