What questions do you incorporate in your surveys (on non-covid related topics) to be able to correct for behavioral change due to the sars-cov2 epidemic? I will be doing a survey on HIV and HIV-risk behavior in order to estimate PrEP-eligibility, but people have changed their sexual behavior significantly due to the sars-cov2 epidemic. What questions could I ask, or have you asked, to gain insight into how much people have changed their behavior, and if this change will be long-lasting or depended on direct threat level of sars-cov2?