Half of the people who had their blood tested last year did not return to collect their results, according to human immunodeficiency virus (HIV) advocate Temo Sasau.
Mr Sasau said this meant many could have tested positive for HIV without knowing it, increasing the risk of spreading the virus.
“Knowing your status is vitally important,” he said.
“Going to the hospital and getting a test is not enough, you need to go back and get your results.”
While sharing his concerns in a video posted on his Facebook page, Mr Sasau urged everyone to complete the process for their own health and the safety of others.
“There is treatment out there that can help you, but you need to know your results first.”
Minister for Health Atonio Lalabalavu, while confirming this, said stigma, fear and other personal reasons often stop people from returning for their test results.
“We want to remind everyone, if you’ve had a blood test done, go back.”
Dr Atonio said this was a huge challenge the ministry faced.
“Give your correct information and know that support and treatment are available.”
He said returning for the results was just as important as getting tested.