The allergy is caused when a tick bites deer, sheep, cattle, horses and pigs, and then bites a human. A substance in the tick's saliva triggers our immune system to overreact to meat.
Continue reading at http://www.dailymail.co.uk/health/article-3223560/Just-one-tick-bite-fatal-allergy-meat-six-Britons-suffered-severe-reactions.html?ITO=1490&ns_mchannel=rss&ns_campaign=1490
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