Any shorter time would increase the risk of a dangerous allergic reaction.

This is a dangerous reaction that can happen without anyone knowing.

But babies that young should not be vaccinated, because they are vulnerable to dangerous reactions.

Rarely, antibiotics can cause a dangerous allergic reaction that requires emergency care.

In rare cases, antibiotics can cause a dangerous allergic reaction that requires emergency care.

Your child was prescribed an allergy kit because she is at risk for a dangerous allergic reaction.

These can signal more dangerous reactions that require immediate treatment.

This drug may cause a dangerous reaction in people who are allergic to horses.

The drug can cause dangerous allergic reactions and requires special monitoring.

Combining Ecstasy with other drugs and alcohol can cause dangerous reactions.