The Australian Vaccination-risks Network Inc., formerly known as the Australian Vaccination-Skeptics Network (AVsN), and before that known as the Australian Vaccination Network (AVN), is an Australian anti-vaccination pressure group registered in New South Wales. As Australia's most controversial anti-vaccination organisation, it has lobbied against a variety of vaccination-related programs, downplayed the danger of childhood diseases such as measles and pertussis, championed the cause of alleged vaccination victims, and promoted the use of ineffective alternatives such as homeopathy.