PCR can detect the virus as well as identify the type of herpes virus. Because this test is more sensitive than culture, it is useful in circumstances where the virus is present in low numbers (such as viral encephalitis) or if the lesion is several days old.
After a brief stop at Jamaica, Columbus sailed to Central America, arriving at Guanaja (Isla de Pinos) in the Bay Islands off the coast of Honduras on 30 July. Here Bartolomeo found native merchants and a large canoe, which was described as being long as a galley and filled with cargo.
If you want a good guess, most historians have agreed on Guanahani Island which today is known as Watling Island in the Bahama's. The reason for the debate is that Christopher Columbus was notorious for keeping inaccurate logs on distance throughout the first voyage. In fact, Columbus did this on purpose. Columbus was a sailor who sailed by Dead Reckoning and he was an expert at it. As far as a mathematical sailor--- he was not.