UK: +44 1379 658 721
Ireland: +353 89 221 3723
USA: +1 754 252 3536
Middle East - N. Africa: + 971 52 873 4738
Australia: +61 3 9310 5259
It’s a vital question. Do people have a so-called 'immunity debt' and if so, does it put us at more risk of infections in general?
The idea behind immunity debt is that the covid lockdowns reduced our exposure – therefore our everyday immunity - to other infections. There have been some confusing reports in the media, so who’s right? Here’s what the scientists say. Thank you, as usual, to New Scientist magazine for the insight.
The theory behind immunity debt
The idea is that some countries are experiencing more respiratory infections than they did in pre-pandemic times thanks to the lasting impact of lockdowns. While doctors accept the theory, there have been reports in the newspapers about it being a sham, mainly originating in the USA but one crept into the Financial Times as an ‘opinion piece’. It claimed the idea of an immunity debt is ‘misguided and dangerous’.
So who’s right? The first problem is, ‘immunity debt’ means different things to different people. The second issue is that the way nations responded to the pandemic has become so politicised. There’s significant tension between the people who were in favour of lockdowns, masks and vaccines and those who denied covid, who thought there was no need for restrictions. Luckily, thanks to science rather than politics or feelings, we can pin down the truth.
The truth about this year’s flu and RSV levels
In the northern hemisphere the first two pandemic winters saw far fewer cases of flu and respiratory syncytial virus than we saw before covid. This is almost certainly why we’re seeing such high rates of both viral infections now in the UK and USA, and it’s also why the UK’s Health Security Agency feel this year’s flu vaccination campaign is so vital.
How about RSV? Doctors are already concerned about number of extra cases of RSV caused by immunity debt, and our paediatricians are worried kids will encounter a ‘perfect storm’ of health issues over the next few months.
All this means immunity debt is very real. But there’s another dangerous rumour to squash around immunity. While covid deniers say higher levels of respiratory infections prove children’s immune systems have been damaged by their lack of exposure to the normal childhood infections, this is absolutely not true.
The immunity debt argument doesn’t mean we shouldn’t have had lockdowns, either. If we’d left the virus to spread unchecked, with death rates of over 1%, we would have seen a disastrous number of deaths.
Right now, because of vaccines and the milder omicron variant being dominant, the current UK fatality rate has dropped to around 0.04%, the same as flu. And this is why so many countries have now dropped their covid restrictions.
The truth about immunity debt
At the end of the day, as it is in so much about life, the truth is more complex than politicians and anti-restriction campaigners would like it to be. Lockdowns have saved millions of lives, but there have also been downsides – one of which is almost certainly immunity debt.