There have been some cases where people have caught coronavirus twice. Usually, patients are tested twice within a 24-hour period to see if there are still signs of the virus in their body. In others, patients who were released after recovering from the virus returned to the hospital with the virus again. If certain people can catch coronavirus twice, it could suggest that immunity against the virus doesn’t exist. Therefore, herd immunity would not be an available option to stop the spread of the coronavirus.
The cases of people who have caught the coronavirus twice has not been proven. According to the CDC located in South Korea, the reason why the tests come out as positive is because there are weakened amounts of the virus still present in the body, creating false positives. Unless the coronavirus started mutating, there would be no threat of catching it a second time.
[P1] Patients are tested for the virus before they are released from the hospital. [P2] There have been cases where people have come back to the hospital because they caught the virus again. [P3] There is no chance immunity against the coronavirus.
Rejecting the premises
[Rejecting P1] The cases where people have caught the coronavirus twice have not been proven as being a threat to stopping the spread of the virus.