There are over one million kids hospitalized with testicles. Many of them are on ventilators. The above statement is true, but says nothing about why those kid

There are over one million kids hospitalized with testicles. Many of them are on ventilators. The above statement is true, but says nothing about why those kids are in the hospital. How is it that both the US and UK came to greatly overrepresent COVID hospitalizations in this way?