How prepared will Australia be for the next pandemic? | 7.30

Key Concepts:

• HKU5 virus: A coronavirus related to MERS, found in bats and minks, with potential for human infection.
• Spillover event: Transmission of a virus from one species to another.
• Receptor: A structure on the surface of a cell that binds to a specific substance, such as a virus, allowing it to enter the cell.
• Interim Centre for Disease Control (CDC): Australia's newly launched center to prepare for future outbreaks.
• National Incident Centre: A coordinated response center activated during significant health events in Australia.
• Universal vaccine: A vaccine designed to protect against multiple variants of a virus or even multiple related viruses.
• Zoonotic pathogen: A disease-causing agent that can be transmitted from animals to humans.

HKU5 Virus Discovery and Mutation

• Dr. Michael Letko and his team at Washington State University are studying coronaviruses related to MERS.
• Their research, published in Nature, reveals that the HKU5 virus is mutating rapidly.
• Dr. Letko emphasizes the importance of screening viruses globally to identify potential threats.
• "I think our work is unique in that you know there are not that many groups really trying to screen all the world's viruses to understand which ones are going to be a problem" - Dr. Letko
• Concerning reports indicate new HKU5 viral spillover events are occurring across Asia.

Infection Mechanism and Cross-Species Transmission

• Dr. Letko's lab discovered that HKU5 uses the same infection method as SARS-CoV-2 (COVID-19).
• The virus originates in bats.
• A separate study found HKU5 in dead minks in China, indicating cross-species transmission.
• "I think that was really a surprise was seeing that shift and then you know we maybe had an idea that that was coming when we saw that it was being found in mink you know you see that little early species transmission event and then you're thinking okay well if it can do that what's to keep it from going further" - Dr. Letko
• The virus's receptor is not very compatible with human lungs, but mutation could change this.
• The possibility of human infection exists, but further surveillance is needed to confirm.

Australia's Response and Monitoring

• Australia's Interim Centre for Disease Control is monitoring HKU5 as a zoonotic pathogen.
• Chief Medical Officer Michael Kidd states the government is actively advised on the virus.
• "If there are changes in the uh transmission of this particular virus obviously we'll be uh alerting uh the people of Australia about that" - Michael Kidd
• The Interim CDC was launched in January 2024 and is expected to be permanently established in January 2026.
• Activation of the National Incident Centre may be necessary if HKU5 becomes a significant concern.
• States and territories retain the power to decide on restrictions like lockdowns.
• Decisions on public health measures will be based on the specific infectious agent, transmission, affected populations, and knowledge of the agent.

Interim Centre for Disease Control (CDC) and Pandemic Preparedness

• Professor Katherine Bennett co-led an inquiry into Australia's COVID-19 response.
• The report highlighted the importance of public trust in government decisions.
• The CDC operates outside the government to provide transparent advice with supporting evidence.
• "Sitting outside government is really important So it will be able to offer advice and then publish the advice with the evidence behind the advice do things that we didn't quite see previously but also building relationships with our researchers across the country so that we can really bring that technical advice in centrally and have a significant source of expertise that's then available to Australians" - Professor Katherine Bennett
• The CDC will conduct scenario testing and report findings to governments to improve pandemic preparedness.
• "I think the CDC operating outside the tent is a really um useful u part of the transparency that I think will make it quite an impactful body as well" - Professor Katherine Bennett

Conclusion and Future Actions

• HKU5 has not yet been detected in humans.
• Dr. Letko suggests developing a vaccine that includes HKU viruses as a proactive measure.
• "You know short of preparing and trying to include HKU viruses in the next universal vaccine design I think is the smart way to go about it" - Dr. Letko
• Further data is needed before widespread concern is warranted, but preparation is crucial.