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Defeating coronavirus gets more difficult, Fed minutes due, and emerging economies take a hit.

Doctors in the northeast of China are seeing the coronavirus manifest differently among patients in the new cluster of cases there. The latter are taking much longer to develop symptoms than was observed in Wuhan, making it harder for authorities to catch cases and stop a feared second wave of infections. On the vaccine front, there was a reality check on the early test results from Moderna Inc. which took the wind out of its share price surge.