COVID vaccine safety. Rapid development

Vaccines usually take more than 10 years to develop, with regulatory reviews and approvals alone typically taking 1-2 years. Source.

The COVID-19 pandemic was declared in March of 2020, with the public beginning to receive COVID vaccines by the end of that year. Source.

Okay then.

Note: These COVID vaccines are also essentially the first coronavirus vaccines (source) and the first DNA/RNA vaccines (source) for human use.