Apple co-founder Steve Wozniak has tweeted that he and his wife may have been among the first in the U.S. to have the COVID-19(Coronavirus) after returning from a trip abroad.

Wozniak took to Twitter an hour ago, saying that his wife had a bad cough after returning from China on January 4. The tweet was geotagged with SwarmApp (allows users to share their locations with their friends), indicating that he and his wife were being examined at Santa Clara’s West Coast Sports Institute.

Checking out Janet’s bad cough. Started Jan. 4. We had just returned from China and may have both been patient zero in U.S. (@ West Coast Sports Institute in Santa Clara, CA) https://t.co/MRNHqithEU — Steve Wozniak (@stevewoz) March 2, 2020

Coronaviruses are common in many animal species (such as camels and bats) but in some cases, although rarely, they can evolve and infect humans and then spread to the population. A new coronavirus is a new coronavirus strain that has never previously been identified in humans. In particular, the one provisionally named at the beginning of the 2019-nCoV epidemic, has never been identified before being reported in Wuhan, China in December 2019.

The most common symptoms of a coronavirus infection in humans include fever, cough, breathing difficulties. In severe cases, the infection can cause pneumonia, severe acute respiratory syndrome, kidney failure and even death.