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Virology Down Under

Facts, data, info, expert opinion and a reasonable, occasionally grumpy, voice on viruses: what they are, how they tick and the illnesses they may cause.

Tag: epidemiology

Age and COVID-19: What’s with all the young kids?

Posted onApril 14, 2026April 20, 2026Leave a comment

Inspired by an online conversation and the hard work of others, I set off to examine age groupings among Australians confirmed as COVID-19 cases, based on testing using a quality-laboratory Read More …

CategoriesCOVID-19, Emerging disease, SARS-CoV-2, VariantsTagsepidemiology

Whooping cough in 2024 was huge in Australia, but is declining in 2025 and 2026

Posted onFebruary 19, 2026February 19, 2026

The risks of declining childhood vaccination include a resurgence of dangerous infectious diseases driven by airborne pathogens such as Bordetella pertussis, the bacterium that causes whooping cough (also called pertussis). A Read More …

CategoriesBordetella pertussis, Epidemic, Vaccines & vaccinationTagsAustralia, epidemiology

COVID-19 in Australia

Posted onMarch 9, 2020March 9, 202011 Comments

As the cases begin to build up – but are still pretty low with limited community spread having been detected – now is a good time to start watching where Read More …

CategoriesCoronavirus, COVID-19, Pandemic, SARS-CoV-2TagsAustralia, epidemiology

An early look at influenza in the US highlights that the south does not predict the north

Posted onNovember 24, 2019November 24, 20191 Comment

Influenza (flu) hit Australia earlier in 2019 than it had for many years. It reached a very high peak of cases and the flu season lasted for longer than usual. Read More …

CategoriesInfluenzaTagsepidemiology, United States of America

How many common cold viruses in one place, in one season?

Posted onSeptember 2, 2018September 22, 20203 Comments

I was recently asked how many common cold viruses are among us at a given time? The short answer is – dozens!  In the past, I’ve written a few reviews (for Read More …

CategoriesRhinovirusTagscommon cold, epidemiology, genotype, molecular epidemiology, PCR, rhinovirus

Flu is giving Australia a breather….

Posted onAugust 21, 2018August 25, 2018

August is the traditional Australian peak influenza (flu) month. The peak can move around a bit but it usually flu virus party time, followed in size by September. We’re two-thirds of Read More …

CategoriesInfluenzaTagsepidemiology, influenza, lab testing, molecular epidemiology

Minding the gap: looking at numbers early in an outbreak

Posted onAugust 15, 2018August 25, 20182 Comments

The second Ebola virus disease for 2018 continues to unfold in the Democratic Republic of the Congo. Nearly two weeks have passed since the official announcement of the outbreak by the Read More …

CategoriesEbola virusTagsControl gap, Democratic Republic of the Congo, DRC, Ebola virus, Ebola virus disease, epidemiology, Equateur Province, EVD, Ituri Province, North Kivu Province

Mapping Ebola in the hobbyist zone…

Posted onMay 21, 2018May 22, 201818 Comments

One of the most important parts of an early understanding of the risks attached to an infectious disease outbreak is knowing where it is. Which country? What part of the Read More …

CategoriesEbola virusTagsDemocratic Republic of the Congo, Ebola virus disease, epidemiology, EVD, Maps, WHO

New Ebola virus disease case confirmed in a third DRC health zone

Posted onMay 17, 2018May 17, 2018

UPDATE #1 The Democratic Republic of the Congo (DRC) Ministry of Health (MOH) today announced that 1 of 2 suspected EVD cases in the Wangata Health Zone has tested positive for Read More …

CategoriesEbola virusTagsconfirmed, Democratic Republic of the Congo, DRC, Ebola virus disease, epidemiology, EVD, spread

SNAPDATE: Ebola virus numbers

Posted onMay 15, 2018

Ebola virus disease (EVD) case numbers are very mobile at this stage. But working with what we have, we can see from the graph below that there has been a Read More …

CategoriesEbola virusTagscase accumulation, Democratic Republic of the Congo, DRC, Ebola virus, epidemiology, EVD

Ebola numbers rise a little…

Posted onMay 14, 20181 Comment

According to a new Situation Report from the World Health Organisation,[6] the case numbers in the Democratic Republic of the Congo outbreak are now…. Total suspected+probable+confirmed: 39 This includes: 2 Read More …

CategoriesEbola virusTagsDRC, ebola, Ebola virus disease, epidemiology, EVD, SitRep

Is increased testing at the root of Australia’s biggest ever first quarter of Flu cases…?

Posted onApril 7, 2018June 11, 2019

I’ve seen some media reporting an “early start to the flu season”. Is this true? The short answer is – I don’t know. Let’s explore why I can’t answer my Read More …

CategoriesInfluenzaTagsepidemiology, Flu, influenza, notifications, seasonal influenza

Flu numbers from the US…Peaky McPeakFace

Posted onMarch 3, 2018March 4, 2018

This year’s annual influenza (flu) H3N2 epidemic in the United States (US) has peaked. It’s been a big season in the US and the United Kingdom and in Canada, as it was Read More …

CategoriesInfluenzaTagsepidemic curve, epidemiology, Flu, H3N2, influenza, seasonal influenza, United States of America

Flu may not be peaking even if it looks like it is right now…and here’s why

Posted onFebruary 10, 2018February 17, 20257 Comments

According to the latest flu report, the United States (US) influenza (Flu) season looks like it has peaked.[1] And perhaps it has. But the graphs are only as solid as Read More …

CategoriesCommunication, InfluenzaTagsepidemiology, influenza, lag, reporting, seasonal influenza, United States of America

Where is H7N9 in 2018?

Posted onJanuary 31, 20186 Comments

I’ve been watching avian influenza A(H7N9) virus cases in humans since they popped onto the radar in 2013 (it was among my first blogs, “H7N9 deaths” [1]). So I’m confident when Read More …

CategoriesInfluenzaTagsavian influenza, China, epidemiology, H7N9

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Recent Posts

  • Age and COVID-19: What’s with all the young kids? April 14, 2026
  • Asymptomatic, acute and persistent COVID-19 symptom changes over the course of three infections March 5, 2026
  • How are asymptomatic COVID-19 cases tracking? March 2, 2026
  • Another way to look at flu season size February 28, 2026
  • Whooping cough in 2024 was huge in Australia, but is declining in 2025 and 2026 February 19, 2026
  • Pathology lab PCR is not research lab PCR January 27, 2026
  • Is there more flu in Australia and New Zealand than normal for Christmas? Hell Yes! December 27, 2025
  • Catch them all? There are three different influenza viruses and they can co-circulate each season August 22, 2025
  • The “Infection Pause”: because it’s about fewer infections, not an immune debt to repay July 31, 2025
  • A Flunami in July July 27, 2025
  • COVID-19 is a Pandemic: What if it was a Pandemic Emergency? And what are they anyway? July 24, 2025
  • In Australia, COVID-19 deaths did decrease between 2023 and 2024, but it’s still a major killer. July 2, 2025
  • Flu down under is a July thing June 16, 2025
  • Q fever – an old zoonosis with a better diagnosis June 9, 2025
  • What if Harvard loses? April 19, 2025

All opinions are my own and do not represent medical advice or the views of any institution.

All graphics made by me are free-to-use. Please just cite the particular page, blog and me. A heads-up would be nice, but that can happen later.

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Recent Posts

  • Age and COVID-19: What’s with all the young kids?
  • Asymptomatic, acute and persistent COVID-19 symptom changes over the course of three infections
  • How are asymptomatic COVID-19 cases tracking?
  • Another way to look at flu season size
  • Whooping cough in 2024 was huge in Australia, but is declining in 2025 and 2026

All opinions are my own and do not represent medical advice or the views of any institution.

All graphics made by me are free-to-use. Please just cite the particular page, blog and me. A heads-up would be nice too but that can happen later.

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