(CNN) — Travel bans meant to stop the coronavirus from getting to the US from China and Europe came too late, according to a new analysis of cases from the US Centers for Disease Control and Prevention.

The US restricted travel from China on February 2 and from Europe on March 13, but by March 8, Covid-19 was already circulating among the community in New York City and, by March 15, community transmission of the virus was already widespread, the analysis found.

What was circulating most closely matched the strain of the virus circulating in Europe, not China, which President Donald Trump has repeatedly blamed for not preventing its spread to the US.

By the time the Trump administration had placed travel restrictions on Europe, the importation of the virus and the community spread of the disease had already started in New York City, according to the report. Testing was limited at the start of the epidemic in New York City, which allowed people with undetected cases to spread the virus.

Trump has repeatedly pointed to his travel bans as evidence that his administration has effectively responded to the pandemic, claiming as recently as Tuesday that “we saved millions, potentially millions of lives.”