Afterward, the noblewoman caught a bad disease. Karen cared for her earnestly.

之后，贵妇人染上了病并且很严重。凯伦细心地照料着她。

It's also unclear whether the new SARS-CoV-2 variants cause worse disease and warrant such a change.

目前还不清楚新的SARS-CoV-2变种是否会导致更严重的疾病，是否需要这样的变化。

The only reason you would have to really get rid of the stuff is if you have a really bad disease problem, and you don't have a way to sterilize it.

但在一种情况下你必须远离它，就是如果你患有一种非常严重的疾病，而你没有办法对它进行消毒。

You don't want to scare people to death on how bad these diseases can be, but at the same time, you want them to understand that these diseases are serious and can cause really bad disease and sequela.

你不想因为这些疾病有多严重而把人们吓死，但与此同时，你想让他们明白这些疾病很严重， 会导致非常严重的疾病和后遗症。