And it originated in Vietnam and spread to Hong Kong. The people who brought it all over the world were visitors to Hong Kong, who brought it to Singapore, Canada and possibly Taiwan. The Singapore doctor who treated one of the patients who contracted the disease in Hong Kong (and came back to SIN
) went to New York for a conference but he is not known to have spread it to anyone there.
And thanks to Singapore Airlines - a member of star alliance - who flies their New York - SIN
route through Frankfurt, the Singaporean doctor has contributed to the first known case in Europe.
I don't think its serious at all. People who've contracted this disease are mostly medical staff and their families who treated patients with the similar disease.