Dr Kami Temba Sherpa of the remote Khunde Hospital in the Himalayas has concerns about the border opening after he contracted COVID-19 in December.
"When I developed pneumonia or my oxygen saturation was dropping down, I thought I was not going to make it," he tells Newshub.
He believes there's a high chance new strains of COVID-19 will come in with the mountaineers.
"People are working, walking, without any masks, there's no social distancing, there's no physical distancing. So yeah, we are worried."
The remote Khumbu region of the Himalayas is home to thousands of Sherpas, and the virus has made its way into the far reaches of those secluded mountains and valleys.