If you add the number of infections for the EU countries and compare that to the US, the EU has about 15x more infections than the US for similar populations. That is because Trump stopped the flights from China as soon as he learned about the potential pandemic. Trump did his job. Now the healthcare professionals in government need to do theirs.
Coronavirus Update (Live): 157,643 Cases and 5,845 Deaths from COVID-19 Virus Outbreak - Worldometer
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The number of your cases is so low because you haven't tested anywhere near the number of people suspected of having the virus, and because it's just getting started. The USA is where China was at in early December, except in China, the epidemic was more localized. In the USA, where the population is more mobile, the virus has quickly spread throughout the country.
Trump didn't ban travel from China until February 4th, and by then it was too late. The virus was already loose in the USA. But what the ban did do, was to give the appearance of doing something, and then Trump ignored the whole thing for another 3 weeks.
One has to wonder if Trump has deliberately botched getting the tests out because he's trying to keep the numbers low. He sure doesn't want to see those numbers going up and if you can't test, you can't confirm.