Now utopia has grown unfashionable, as we have gained a deeper appreciation of the range of threats facing us, from asteroid strike to epidemic flu and to climate change.
Every year before the U.S. flu season starts in the fall, scientists develop a vaccine based on whatever strains of the flu they expect will circulate.
In an experiment that exposed healthy volunteers to a cold or flu virus, researchers found that people with a generally sunny disposition were less likely to fall ill.
When a synesthete comes down with a cold, flu or something like an ear infection, it can affect how they experience their condition, either strengthening or weakening it, or making them feel out of whack and not right.
On the left those are U.S. numbers, on the right are global numbers for coronavirus, and you can see obviously flu does cause a lot more illness and a lot more death in the United States and around the world.
Flu viruses circulate around the world throughout the year but a flare up in the U.S. is most common in the fall and winter hitting it's worst point between December and February according to the Centers for Disease Control.
It's the first time in 15 years that every state in the continental U.S. has reported widespread activity during the same week and it's possible that the current flu season that's ravaging the country hasn't event peaked yet.
让我元气大伤。
读选择真题（英语一） 
文听写 
，我们要面对的是更可怕的现实，彗星撞地球、重度
气候变更。
