The I.E.S. has a long history of being used and was later replaced by the I.E.S._R which has become an acceptable measure for assessing potential P.T.S.D. it easy for participants to answer and is also very useful for exploring issues in treatment/therapy. It measures responses in the last seven days although P.T.S.D. is not usually diagnosed until 28 days after the traumatic event. What you need to decide is what is the traumatic event. As an aside as the risk of quarantine is still present is the response understandable or traumatic? The I.E.S. -R is readily available from the Internet. Good luck MJB