Bangladesh, July 13 -- 19 patients, who have recovered, could lose their immunity to the disease within months and that the virus could reinfect people year after year, like common colds, scientists say.

The study examined more than 90 patients and healthcare workers at Guy's and St Thomas' NHS foundation trust and found levels of antibodies that can destroy the virus peaked about three weeks after the onset of symptoms then swiftly declined, reports The Guardian .

Besides, 60 percent of people marshalled a "potent" antibody response at the height of their battle with the virus, said the study after conducting their blood test. Only 17 percent retained the same potency three months later.

Antibody levels fell as much as 23-fold over th...