Positive coronavirus tests are surging in parts of the U.S., especially in the Midwest.
According to a new analysis from Reuters, North Dakota's positive test rate has averaged 30 percent over the past week. That's compared to 6 percent the week before.
Other states, including South Dakota and Montana, are also experiencing high positivity rates.
Guidance from the World Health Organization says rates above 5 percent are cause for concern. That's because it could mean there are even more cases in the region that haven't been discovered yet.