Under my interpretation, she she is not 'a patient' (noun), she is 'patient' (adjective).By zero she means she is an ordinary person, but what does she mean by calling herself a "patient"?
Interesting. I was way off track then.When an illness or disease enters a country, researchers tracing the history of the disease's spread look for 'patient zero', the first person known to have the disease.
Monica Lewinsky is using the term figuratively, calling herself "Patient Zero" of cyberbullying, because, as she sees it, she was "“The first person to have their reputation completely destroyed worldwide via the Internet.”
Source: Forbes.com: "Monica Lewinsky Speaks: 'It's My Mission To End Cyberbullying.'"
(Oct, 20, 2014)