Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: Can someone who was sick in Feb with what they thought was the flu, now test positive for Covid-19?Or in other words, is the virus similar to Hep-C where you can still test positive weeks after recovery because of antibodies?. ### Response: There is no reliable antibody test yet available.Once one exists it should be able to confirm exposure within the last year, perhaps longer. The immune response still not fully understood..