The best measures so far come from India: How this country fares for foreigners from Italy and others

So far, India has reported about 125 cases of coronary, and it is a little mystery of how the second nation with the largest population in the world, with 1.3 billion people, has remained relatively unsurpassed in this regard.

Doctors say this has either happened because there are many more cases in India than have been discovered, because of testing difficulties, or that India has really managed to escape from the worst, because of rapid and strict measures from the start, writes New York Times.

In Kerala, the state in southern India, authorities used GPS technology to track the movements of an Indian family believed to be among the first to be infected with coronarys.

They returned from Italy in late February, and within days, medical teams went to all the places they had visited, including banks, restaurants and churches, and immediately quarantined almost all those with whom this family had contacted, which were about 1,000 people.

India was also one of the first countries to basically close its borders, cancelling visits and denying access to all except some elected foreigners.

Some countries, such as Kerala, have also begun to improve internal controls by measuring passenger temperatures in cars and examining people on trains.