They think its population grew rapidly and then remained more or less stable until the arrival of the Europeans, who introduced deadly diseases to which islanders had no immunity.

他们认为岛上的人口增长迅速，然后保持或多或少的稳定速度来增长，直到欧洲人的到来引进了岛上居民对其没有免疫力的致命疾病。

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The rise of social networking has made it easier for people with uncommon diseases to connect with each other and feel less alone.

社交网络的兴起使患有罕见疾病的人更容易相互联系，也不那么孤独了。

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The causative organism is from the family of bacteria which causes tuberculosis and leprosy but Buruli ulcer has received less attention than these diseases.

致病微生物与引起结核和麻风的病菌属同一家族，但是布鲁里溃疡比这些疾病获得较少重视。

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One reason: Brits have less incidence of common diseases such as diabetes, hypertension, stroke and cancer.

FORBES: Two Girls Two Countries One Cancer

And as Genzyme's Mr Tambuyzer notes, rare diseases become less rare once a drug is on the market.

ECONOMIST: Rare diseases: Safety in numbers | The

It is simply to point out that animals given more space and air may be at less risk of catching diseases from their neighbours.

BBC: The pointless slaughter?