A hypersensitivity reaction happens when the immune system mistakenly identifies harmless substances as harmful. There are several types of hypersensitivity reactions, depending on the class of ...

Infusion reactions, also known as acute infusion reactions or infusion-related reactions, are common adverse effects that can occur when a person receives medication intravenously. Infusion reactions ...

WhatsApp will now let you react to messages using any emoji of your choice You can tap the Plus symbol next to the six pre-chosen message reactions and select a different emoji from your keyboard.

In a recent WhatsApp update, the messaging platform launched new emoji reactions allowing its users to react to messages with emojis like a thumbs up or a heart. Similar to Messenger’s and iMessage’s ...

A nasal spray can tamp down potentially fatal reactions, a boon to the many patients in crisis who fear using EpiPens. Neffy, a new device approved by the Food and Drug Administration, is the first ...