What do we know about the risks of Long Covid? A closer look at Long Covid, what we know about how risky it is, and how serious it is. It can be very serious, enough that avoiding infection is a good idea. But how likely is it? Very hard to measure.Continue Reading
What does a 1 in 1000 year flood mean? Something labelled that way is now much more likely to happen than 1 in 1,000, as rainfall becomes both heavier, and more intense because of climate change.Continue Reading
What proportion of reported Covid19 deaths are caused by Covid19, rather than being with Covid? Evidence from Australia and the UK suggests the vast majority of reported Covid19 deaths are caused by Covid19, and the others were hastened by it.What proportion of reported Covid19 deaths are caused by Covid19, rather than being with Covid? Evidence from Australia and the UK suggests the vast majority of reported Covid19 deaths are caused by Covid19, and the others were hastened by it.Continue Reading
When is the current Omicron wave likely to peak around Australia? Plausibly the NSW peak is about now (the middle of January) with other states following in the next week or three.Continue Reading
Now that we have the biggest Covid19 outbreak yet in NSW, what is the impact likely to be on hospitals? A fast growing outbreak with lower hospitalisations is still likely to lead to more total Covid19 hospitalisations than we have seen here so far. Continue Reading
Since the Omicron variant was first identified as a variant of concern, everyone wants to understand severity. An initial study in South Africa suggests Omicron is less severe, whereas a UK study finds no difference. My view? Too early too tell.
There are two main published analyses of severity so far (neither peer reviewed) based on substantial population level data from South African and the UK. But even substantial data is still very early in this outbreak.Continue Reading
The Omicron Variant is spreading fast around the world. All the evidence is pointing to higher infectiousness, and less effectiveness of vaccines. It is still not clear whether the disease is less severe. But even a less severe variant is still bad news.
Here in Australia, already nearly 5% of cases being sequenced are Omicron (rather than Delta) and NSW is back to rapid increase in case numbers from being relatively flat for the last couple of months, with a few superspreader events in the news.Continue Reading
Death rates from Covid19 in low income countries have been around double the death rates for the same age in high-income countries. This is not easy to see from headline news for two reasons – low income countries tend to have younger populations, so the population level death rates are lower, and low income countries also have much poorer statistical reporting, making it hard to tease out actual death rates.Continue Reading
Vaccination take-up rates are based on population estimates. For Australia as a whole, the ABS’s estimates of population are probably quite accurate. But the more localised the analysis, the greater the approximations required. Inaccuracies in population estimates are more likely in areas with large transient populations, particularly those who do not have citizenship or permanent residency. It’s probably not a coincidence that the Melbourne City Council area has the highest transient population and the lowest first dose vaccination rate in the whole of NSW and Victoria.Continue Reading
If everyone in Australia who can be vaccinated, is vaccinated, what can we expect when Covid19 becomes widespread in the population? There are likely to still be significant pressures on the hospital system, particularly if it happens too quickly.
If, after everyone in Australia who can be is vaccinated (I’ve assumed 95% of everyone 12 and over), everyone in Australia is exposed to Covid19, what can we expect from Covid19? We can expect around 400,000 – 600,000 eventual hospitalisations (60% of whom would have been vaccinated), with around 50,000 – 80,000 (70% of whom would have been vaccinated) of those ended up in ICU. Around 200,000 – 400,000 people are likely to end up with Long Covid, the majority of whom (150,000 – 250,000) will be of working age. And around 15,000 – 25,000 (50% of whom would have been vaccinated) deaths from Covid are likely to occur. How long will that take? That depends on how well we control the spread of Covid19.Continue Reading