Some people are allergic to certain foods, medicines, insects and latex. When they come into contact with these things, they develop symptoms such as hives and swelling. Minor or severe symptoms can lead to a serious allergic reaction called anaphylaxis.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .