Covid-19 has affected more than 26,50,000 people and have caused fatalities of approx. 1,80,000 as of now. Currently, it is being reported that the Covid cases are getting relapsed in few patients who got recovered from the disease. The recovery rate of coronavirus is quite soothing to see, but it does not promise us that those who have been affected by the virus are not out of risk from getting infected. Experts are of the opinion that, having the virus once does not mean that person cannot get sick from the disease again.
According to the director of pneumonia prevention and treatment at China Japan Friendship hospital, Li QinGyuan, those people who have been infected with coronavirus will develop a protective antibody. He also added that, reports do not give data as to how long the protection is going to last in the body of a human. However, in specific individuals it is said that the antibody would not last for long. Hence, there is possibility that for many patients who have been treated and cured for coronavirus has a likelihood of relapse. Experts says that, just like a flu mutating, Covid can also mutate among individuals, which makes a person susceptible to reacquiring the infection again.
In South Korea, which has been successful in mitigating and curbing Covid-19, it is being reported that Covid is getting relapsed among people. The health authorities of Korea have identified 163 patients who was tested positive again after a full recovery from the disease. Hence, those patients who have recovered from coronavirus in South Korea i.e. approx. 7,829 individuals have been put back in isolation. 
Scientists have issued warning to people that, if the immune system of a recovered patient is quite weak, then there is a likelihood of relapse among such individuals. Also, further studies are required to understand whether it is possible for a person to get reinfected with Covid-19 and the health officials recommends those people who have been cured from the infection to follow the correct hygiene steps which has been laid down by CDC.