The COVID-19 vaccines are considered safe based on extensive recent research and monitoring. A large nationwide study in Denmark involving over 1.5 million people who received the updated mRNA vaccines showed no increased risk of 29 serious adverse events, such as heart inflammation or brain bleeding, within 28 days after vaccination. These findings confirm no statistically significant safety concerns with the latest vaccines used in the 2024-2025 and 2025-2026 seasons.

mRNA vaccines, which have been studied for decades and used widely since 2020, show safety profiles similar to traditional vaccines, with common side effects like injection site pain and fatigue that are typically mild and short-lived. Serious side effects, including rare cases of myocarditis, have been closely tracked and remain very uncommon, with no elevated long-term risks found.

Regulatory bodies like the FDA continue to monitor vaccine safety with ongoing trials and real-world data, endorsing updated versions of the vaccine to match circulating variants and recommending vaccination particularly for older adults and high-risk groups. Overall, COVID-19 vaccines reduce the risk of severe illness and death from the virus without causing significant safety issues.

In summary, current COVID-19 vaccines are safe and effective , with rigorous studies and real-world evidence supporting their use and continued monitoring to ensure public health safety.