Professor Ian Frazer, one of the world's leading vaccine inventors, who co-invented the groundbreaking HPV cervical cancer vaccine, explained why developing a vaccine for Covid-19 could be "tricky", but added that the virus could also fade away
The Australian told news.com.au that trying to immunise against coronavirus was like trying to immunise against the common cold - difficult to impossible.
He added: “It is tricky, vaccines for upper respiratory tract diseases, because the virus lands on the outside of you."
Prof Frazer, of Queensland University, said 100 teams all over the world were testing for vaccines, but he stressed there was no model of how to attack Covid-19.
Immunising against flu was more straightforward, he said.
“Coronavirus doesn’t get into you, it stays on the surface cells in your lungs," he added. "All these flu viruses get into you, so the body can fight and makes T cells.
“This virus doesn’t kill the cells, it makes them sick. At the moment we don’t know how to make a coronavirus vaccine work. That’s why there are 100 vaccines under testing using every conceivable approach.
“We don’t know if any of them will work.”