Coughing.

[Charles]

It's strange that they can do brain surgeory but they haven't even got a cure for a cough or flu.

Because the viruses are constantly changing, they aren't alike.
Our bodies produce antibodies to make them harmless, yet they keep changing. So must the antiobodies made.
Now, how could they make a medicine like that?

[Colourful™]

Because the viruses are constantly changing, they aren't alike.
Our bodies produce antibodies to make them harmless, yet they keep changing. So must the antiobodies made.
Now, how could they make a medicine like that?

Well exactly, but then again Brain Surgeory is extremely extremely hard too.