The immune system's fight against the Coronavirus; convalescent plasma from Covid-19 survivors may be used to treat patients and protect those at risk

Severe Acute Respiratory Syndrome (SARS) and Coronavirus (Covid-19) outbreak are creating emergency in public health sector. Using antiviral, antimalarial and vaccine are still under investigations, so Convalescent plasma therapy for Covid-19 is a current option because it has been succeeded in other Coronaviruses before. This work will discuss what is the Covid-19? What is the source of Covid-19? Is it transmitted from animal to human? And will discuss the convalescent plasma (CP) as a therapy for Covid-19