First discovered in the 1950s, adenovirus is a major class of disease-causing agents that include viruses that causes the common cold.

腺病毒在1950年被发现，是一类致病因子的主要种类，包括能导致普通感冒的病毒。

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Multiple sclerosis (MS) is triggered by unidentified antigens or other disease-causing agents in the environment and affects people who are genetically predisposed to the disease.

多发性硬化(MS)由未知的环境过敏原或其它致病因子触发并影响遗传性易感人群的疾病。

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Multiple sclerosis (MS) is triggered by unidentified antigens or other disease-causing agents in the environment and affects people who are genetically predisposed to the disease.

多发性硬化(MS)由未知的环境过敏原或其它致病因子触发并影响遗传性易感人群的疾病。

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