The US has seen nearly 28,000 whooping cough cases this year.
The US has seen nearly 28,000 whooping cough cases this year.
www.cnn.com
The US has seen nearly 28,000 whooping cough cases this year. Here’s what you need to know | CNN
For the second year in a row, the US has surpassed 25,000 whooping cough cases — another sign of the risks of falling vaccination levels.
