Concerning Covid Immunity

Over the past few weeks I’ve attended a number of events at which most people were not wearing face coverings, including a recent Open Day at which I took my mask off in order to be heard in a very crowded space. Although I still wear a mask on public transport and in shops, most people now do not.

The first thing I’d note is that that there has been a clear upturn in reported Covid-19 cases, with figures now running at about 700 per day:

(Official figures for Ireland are only issued weekly these days…)

It’s not an alarming increase but hospitalizations and testing positivity are also increasing, though the mortality rate remains low because of the protection afforded by vaccines. Incidentally, it was a year ago on Wednesday (8th June) that I received my second Pfizer dose. One wonders how long vaccine protection will last, though, until further boosters are needed. If cases continue to rise I wonder if any measures will be put in place before the start of next academic year?

A number of my colleagues at home and abroad have attended scientific conferences recently, a number of which have led to mini-outbreaks and some instances of quite serious illness. Although most people seem to think Covid has gone away, it clearly hasn’t. A resurgence is all we need right now.

Anyway, one of my colleagues at work expressed surprise that I didn’t catch Covid during the largely unmasked Open Day at the end of April. Of course I might have done but I certainly didn’t display any symptoms. I’ve actually been quite surprised that I have never shown any sign of SARS-Cov2 at all during the entire period of the pandemic, while many of my colleagues and students in the Department have come down with it.

Coincidentally, a comment appeared yesterday on a blog post I wrote a while ago in which I revealed that I have the  CCR5-Δ32 genetic mutation which confers protection against HIV infection. As a matter of fact I have it twice (i.e. homozygotic). For one thing the commenter pointed out that this mutation may have protected against smallpox, which means some evolutionary selection may have been involved in its propagation. The commenter also drew attention to the evidence – by no means conclusive at this stage – that this mutation may also protect against Covid-19. If you’re interested here are links to some papers:

The last of these is a preprint but the other two are peer-reviewed publications.

Could it be that I’ve yet again been a jammy bastard and inherited immunity to Covid-19 too?

One Response to “Concerning Covid Immunity”

  1. […] I’ve never had symptoms and never tested positive. Have I just been lucky, or is there more to it than […]

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