JAMA, provides further evidence of the overall safety of mRNA vaccines.Stay informed with live updates on the current COVID-19 outbreak and visit our coronavirus hub for more advice on prevention and treatment.While mRNA vaccines have been in development for decades, recent technological breakthroughs have enabled them to be at the forefront of the vaccine response to the COVID-19 pandemic.Conventional vaccines work by delivering a weakened or inactivated virus through purified signature proteins of the virus.
The person’s immune system learns to respond, gaining the ability to respond to stronger, active versions of the virus in the future.But mRNA vaccines work differently.