A preservative-free flu shot is a type of flu vaccine that does ... and other microorganisms that might contaminate a vial when a needle is inserted. Some people seek out preservative-free ...

In addition to flu vaccines, childhood immunizations prevent an estimated ... One often-overlooked reason for vaccine hesitancy is needle phobia. Most vaccines are administered via injection, with ...

On a basic level, companies able to offer an alternative form of vaccine delivery to traditional options can set themselves apart from competitors. Needle phobia is a well-known problem ...