Is it likely I will get long COVID?

While these strains appear less severe than the original Alpha and Delta variants, the risk of long COVID remains.

So what does the latest data say about the chance of long COVID? What symptoms should you look out for? And what can be done to support people with long COVID?

For most people, long COVID means not getting better after a COVID infection.

The World Health Organisation defines long COVID as continuing or new symptoms at least three months from the start of a COVID infection that last at least two months and cannot be explained by an alternative diagnosis.

The most common symptoms include fatigue, brain fog, breathlessness, headaches and abdominal pain. But people with long COVID can experience a wide range of problems including cardiovascular issues, mental health problems such as depression and anxiety, insomnia, muscle and joint pain, and gastrointestinal problems.

Australian data on long COVID remains limited compared to international data, and estimates of its prevalence have varied. A report from Australia's parliamentary inquiry into long COVID, published in April, suggested 2-20 per cent of people may develop long COVID following an infection.

A recent Australian study conducted when vaccines were widely available indicates earlier Omicron variants saw 10 per cent of people who caught COVID develop long COVID.

Another recent study, yet to be peer-reviewed, found 18.2 per cent of those infected went on to have long COVID. The wide-ranging estimates are likely to be because of different COVID variants, differences in vaccination, and different long COVID definitions and assessment methods.

The risk is lower in children. One Australian study indicated persistent symptoms in 8 per cent of children who had COVID in 2020, while preliminary research points to a slightly lower risk among children infected in 2021.

But more research is needed, especially as the virus continues to evolve. This can be complicated because typical long COVID symptoms are common to many other health problems. As in other countries, more research is now underway in Australia to determine the accurate prevalence of the condition using a definition and methods that carefully exclude other causes.

Although research on long COVID risk factors with new variants is ongoing, we expect being female, having more severe initial disease and having other health conditions will increase a person's chance of getting long COVID.

Research shows COVID vaccines offer protection against long COVID. As well as vaccinations, immunity from previous COVID infections and antiviral treatments are contributing to less severe COVID and potentially less long COVID than we saw earlier in the pandemic.

But while the Omicron waves may lead to fewer cases of long COVID than the earlier Alpha and Delta variants, because so many Australians are contracting COVID, this will still result in a large number of people with long COVID. And each repeat infection presents a new risk of prolonged symptoms.

Long COVID can impact a person's life in many ways. Fatigue following exertion, brain fog and other symptoms can reduce capacity to perform tasks such as concentrating at a computer, manual labour, and even normal household tasks.

Many people with long COVID submitted evidence to the recent parliamentary inquiry that they were unsupported, stigmatised, isolated, and not taken seriously by health professionals.

Evidence suggests many symptoms will improve in most people over 12 to 18 months, although recovery time can differ between symptoms. Some, including gastrointestinal and respiratory symptoms, tend to resolve sooner than others, such as cognitive symptoms.

Long COVID is the kind of challenge Australia's health system finds most difficult. GPs are stretched and the small number of specialist long COVID clinics are struggling to maintain funding.

Australia has trailled behind the US, the UK and Europe in rolling out care for long COVID, and in collecting data on the condition.

As a result, support for long COVID in Australia is hard to access, expensive and patchy.

However, there is consensus on what constitutes good care. Clinicians seeing patients with possible long COVID should:

These steps are not a cure but they may improve a person's ability to function in their day-to-day life, at work and to fulfil their caring responsibilities.

The best way to prevent long COVID is to avoid contracting - and spreading - COVID. This means:

Long COVID is not going away, but we all have a role to play in preventing and responding to it.