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Home / New Zealand

Coronavirus: Don't panic over vaccines, just wash your hands

Jamie Morton
By Jamie Morton
Multimedia Journalist·NZ Herald·
4 Mar, 2020 03:11 AM3 mins to read

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In January Director General of Health Dr Ashley Bloomfield said that masks were ‘not any real protection.’ Since then the message has changed. Video / Mark Mitchell

People panicking over a lack of vaccines for Covid-19 should be more focused on just washing their hands, say experts, amid predictions an agent could still be at least a year away.

While labs around the world are pushing toward a vaccine for the new coronavirus at an impressive pace – biotech company Moderna is already testing for Phase 1 clinical trials – officials estimate it's going to be between 12 and 18 months, at least, before one is available for public use.

And despite pressure to develop a new agent – this week, US President Donald Trump was simply told "no" when he asked if the flu vaccine could be used – scientists say prevention, rather than the cure, should be front-of-mind for Kiwis.

People panicking over a lack of vaccines for Covid-19 should be more focused on just washing their hands, say experts. Photo / NZ Herald
People panicking over a lack of vaccines for Covid-19 should be more focused on just washing their hands, say experts. Photo / NZ Herald

"The reality is that this epidemic will likely be over by the time it's even possible to consider having a vaccine available – or certainly on the scale that you'd need to make any difference," said Professor Emeritus Roger Morris, a renowned epidemiologist currently consulting with World Bank on the crisis.

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The former Massey University scientist figured it would take several years to produce one.

"Perhaps if this disease becomes well established, then in five years' time [it] may be able to be vaccinated [for Covid-19] like they are with flu at present … but there's just no way a vaccine can be developed, validated and put into production while we're still in the epidemic phase.

"What's critical for people right now are things like hand-washing and not touching when greeting people – all of these things can be highly effective."

Associate Professor Helen Petousis-Harris, a vaccinologist at the University of Auckland, agreed that hygiene and quarantine were the most effective measures in the short-term.

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"Right now, we've got this wave and we don't know whether it's going to become a disease that circulates around, a seasonal one like the flu, or one that just disappears," she said.

"But what we are starting to see already is the mortality rate coming down where it's being managed well."

For New Zealand, responding to the epidemic in a controlled and protracted way was a better scenario than a "fast-burn" outbreak that could overwhelm the health system.

In the long run, she said, it would be a vaccine that stopped it.

She put much of the swift response by global vaccinologists down to the recently-founded Coalition for Epidemic Preparedness, which had a goal of getting a vaccine into human testing within just 16 weeks of a new pathogen's gene sequence – something completed for Covid-19 back in January.

Approaches to developing a Covid-19 vaccine ranged from the sort of technology used in familiar vaccines like hepatitis and HPV, to the more cutting-edge using DNA platforms and innovations called viral vector templates.

Petousis-Harris saw solving the Covid-19 vaccine challenge is a massive test – and one that could change the landscape for the better.

"I think we are entering an exciting new era of vaccinology where the previously impossible becomes possible."

Those advancements would be needed: Morris said animal-to-people transfers which have driven nearly all the recent major global disease outbreaks were growing because of a rising population and increased interaction with wildlife.

Climate change, too, threatened to widen the geographical spread of important diseases.

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"Events such as the current epidemic are going to become more common in the future, unless we adopt a more proactive approach to their prevention and detection," he said.

"New Zealand has acted very sensibly to protect the population in the current epidemic."

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