BBC News
By Magnus Bennett
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Hundreds of millions of adults around the world can expect to be vaccinated against Covid over the next few months. It will be delivered by hypodermic syringe - but who invented it?
Most people with access to healthcare take vaccinations for granted.
The syringe that is now being used to provide protection against Covid may look simple enough - but appearances can be deceptive.
It took millennia to create the hypodermic syringe in a form that was to allow mass vaccinations to take place today.
An Irish surgeon, Francis Rynd, and French physician, Charles Pravaz, made a huge contribution to the field in the mid-19th Century.