CNN:An issue with England’s COVID-19 smartphone app, launched to curb the spread of the virus, which meant it could not accept around a third of test results has been resolved, the government said on Sunday. The app’s official account had said on Saturday it could not link to test results taken in Public Health England laboratories, via the National Health Service or as part of a survey run by the Office for National Statistics.
 “Everyone who receives a positive test result can log their result on the app,” a health ministry spokesman said. New research, comparing the immune response among age groups, may help explain why elderly patients face a higher risk of severity and death than younger patients in cases of COVID-19. Older patients with the disease have lower frequencies of the immune cells needed to expel the virus from the body, the researchers found. The study was published this week in mBio, an open-access journal of the American Society for Microbiology.