whether there might be bad actors spreading these messages? reporter: absolutely bad actors. some of the new alternative therapies they re bringing up were used early in the pandemic by anti-vaxxers, like long-term anti-vaxxers, pre-pandemic anti-vaxxers. for example, they are telling people, shocking, they re telling people to neb beaux lies hydrogen dioxide. a technique pushed by one of the big anti-vaxxers, disinformation dozen talked about by the white house a few weeks ago. pushed last year. all of this stuff is sort of coming back up now. saying to gargle iodine as well. using medical terminology saying creating an alternative protocol to vaccines. why are these conversations still happening on, for example, facebook? why isn t facebook shutting them down? it s complicated. facebook specifically banned any