Treatments for HIV mean those with the virus can lead a healthy, normal life, unlike in the 1980s and 90s when contracting it was often fatal.
Drugs suppress the virus and prevent it being passed on in what is known as U=U, meaning undetectable = untransmissible.
But the Blue Sky Trust said the stigma around the disease persists and it has heard of cases where people think HIV can be picked up from sharing cutlery or a toilet seat.
In reality, it is usually passed on through unprotected sex.
Nigel Bullock, a member of the Newcastle-based trust, has been posting on social media to counter misinformation about the virus and said he was happily surprised by the response.
“I sat and did a great big post at eight o’clock on a Saturday night and posted all over Facebook, all over Instagram.
“I thought I’ll check them tomorrow morning and then deal with whatever comes back.
“To my amazement, there was no hate, there was no negative, there was nobody saying anything that made me feel awful.
“It was just really positive, people learning, people asking questions.”