I am a retiree. At some point, I have lost smell and taste (they are now back) and had fever (37,5°).  What are the means to determine whether I was infected by Covid-19, if I am now immune and if I am still contagious, when the lockdown is over? 

Loss of taste and smell seem to be clinical signs for a Covid19 infection.

Therefore, when the blood testing will be available (for detection of antibodies), you be able to have a confirmed diagnosis.