People who have spent a lot of time in contact with animals often develop animal-induced allergies, some of them quite serious.

与动物接触过很长时间的人通常会患上对动物过敏的疾病，其中一些还很严重。

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People who have spent a lot of time in contact with animals often develop animal-induced allergies, a significant percentage of which are quite serious.

与动物接触过很长时间的人往往会患上动物过敏，其中大部分是相当严重的。

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This widely used plastic often contains harmful chemicals, including such known carcinogens as vinyl chloride, dioxin, and phthalates, which are linked to asthma, allergies, and reproductive problems.

这种被广泛使用的塑料通常含有一些有害的化学物质，包括一些已知的致癌物质，像氯乙烯、“戴奥辛”、邻苯二甲酸类物质，它们都和哮喘、过敏症和生殖问题息息相关。

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Peanuts in particular are also tricky because, unlike with milk and eggs, children don't often outgrow their peanut allergies.

CNN: 'Exciting' advance reported in peanut allergy therapy

If you do not know whether your child has atopy, check your family's medical history, since such allergies are often genetic.

CNN: HEALTH

It is my belief that nut allergy and most food allergies are often a result of the body becoming sensitised to them through the skin.

BBC: NEWS | Health | Rise in multiple allergy patients