Corona virus is an infectious disease at the same time a contagious. The World Health Organization (WHO) defines an infectious disease as, “Infectious diseases are caused by pathogenic microorganisms, such as bacteria, viruses, parasites or fungi; the diseases can be spread, directly or indirectly, from one person to another. Zootoxic diseases are infectious diseases of … Continue reading Corona Virus-19: An Understanding of the Production-number R0