Drug and disease free is a self-identifying adjective used to show someone is sexually active but does not have a sexually transmitted infection (STI) or involvement with drugs. People who are drug and disease free cannot be receiving current treatment for an STI, even if the infection is in remission or asymptomatic. While drug and disease free suggests someone is free of all drugs and diseases, it usually refers to being free of HIV and AIDS and the intravenous drugs that can be a risk factor for contracting the virus.
The term drug and disease free is typically used in online dating situations. It is especially popular on websites and apps used for casual sexual encounters. It is also used in the sex industry to identify sex workers who are free of transmittable STIs. It is often shortened to various acronyms and abbreviations, including DDF, DD, D/D, D/D free, and D&D free.
The acronym DDF rose to prominence during the 1990s, when the internet was in its infancy. Its use has endured over the years as online dating gained more attention and acceptance. Today, it remains one of the most common acronyms used on dating sites.
When someone states they are DDF, they are usually seeking a sexual partner who is also DDF. This is the opposite of someone who is looking for party and play, or PNP, who would prefer a sexual partner they can have sex with under the influence of drugs.
Despite its prevalence, people have criticized the term DDF because it is not sex-positive. It can stigmatize people who have STIs as unsafe sexual partners, even though this isn't necessarily the case. In some cases, people with STIs are safer sexual partners because they are conscious of their condition and diligent about minimizing the risk to their partners.