public async Task <IActionResult> NegativeTest([Bind("Id,TestDate")] NegativeTest negativeTest)
        {
            var currentUser = await _userInfoManager.FindUser(User);

            try { await _infectionManager.NewNegativeTest(currentUser, negativeTest); }
            catch (ModelException ex)
            {
                ex.UpdateModelState(ModelState);
                ViewBag.TimeOfLastCondition = currentUser.TimeOfLastCondition;
                return(View(negativeTest));
            }

            return(RedirectToAction(nameof(Index)));
        }