contagious polyarthritis

例句：

1. 1.The disease is contagious and needs to be avoided.
   这种病具有传染性，需要避免。
2. 2.The bacteria are contagious and can spread quickly.
   这种细菌具有传染性，传播速度很快。
3. 3. The virus is contagious and can cause serious illnesses.
   这种病毒具有传染性，可以引起严重的疾病。