For many children diagnosed with asthma, pinpointing the particular nature of their case and finding appropriate treatment is far from simple.The lung disease, which affects more than 4.6 million children in the U.S., is often broken down into two categories. The first, known as “T2-high” asthma, is caused by inflammation from a particular type of immune system cell called T helper 2. Until recent years, it was assumed to be the most common form.
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