Epidemiologists have warned that China's refusal to allow a comprehensive investigation into the source of the country's new corona virus threatens the occurrence of new epidemics in the future, and "strengthens suspicions" that the Chinese government is trying to cover up the possibility that the virus was engineered in the lab, according to U.S. news site Politico.

China has rejected a World Health Organization plan to conduct a second phase of investigating the source of the corona virus, which includes the hypothesis that may have been leaked from a Chinese laboratory.

This month, the organization offered to conduct another investigation, which includes inspections at laboratories and markets in the city of Wuhan, where the virus first appeared, and called on authorities to be transparent and assisted by investigators.

"We've already had two epidemics in China caused by the corona virus, and we'll probably have another epidemic of corona virus coming from China as well," Peter Hotz, dean of Baylor College of Medicine and National School of Tropical Medicine in Houston told Politico.

For this reason, the doctor thinks that further investigation in China "is our best opportunity to determine if the virus has passed from bats to humans, and we can not do so without traveling to China."

What the World Health Organization has asked for is very plausible," said Michael Ostrol, director of the University of Minnesota's Center for Infectious Disease Research and Policy, noting that Beijing's refusal to allow an investigation" would provoke conspiratorial speculation about how the virus appeared, that it was a man-made virus and that is was intentionally released."