karim79
9 months ago
Slightly off-topic: Seasonality is something which has intrigued me for a few years now, especially since the covid pandemic, and I've been reading a lot into it.
There are plenty of papers out there which try to explain viral seasonality and just about all of them fall short in terms of really getting a grasp on why viruses tend to 'like' certain meteorological conditions.
I love this paragraph:
"The complex interplay of variables that results in a given virus having such a specific seasonal pattern made me think of the Drake equation. Formulated in 1961, the Drake equation was meant to spark dialogue over the possibility of alien life by taking into account a handful of factors, like the fraction of stars in our galaxy that might have planets and the average number of planets that could support life as we know it. The possibility of extraterrestrial life was not solely determined by one variable but rather by a succession of quantities that needed to be estimated. Likewise, the seasonality of viruses cannot be attributed uniquely to outside temperature, or indoor gatherings, or even shifting humidity levels throughout the year. It’s a result of how all of these factors and more play together with the unique characteristics of individual viruses. If anything, it’s a reminder of the extraordinary complexity of life."
Source: https://www.mcgill.ca/oss/article/covid-19-health/virus-ever...
baxtr
9 months ago
I think it’s unfortunate that we ended up with a calendar that is not perfectly in sync with seasons.
Some calendars like this he Persian/Kurdish ones start with first day of spring. Beginning of autumn is "mid-year", which intuitively makes a lot of sense.
diggan
9 months ago
> I think it’s unfortunate that we ended up with a calendar that is not perfectly in sync with seasons.
We'd all be using different calendars if that was the case, not sure how well that would work in a globally connected world.
"Ok, lets meet the 15th of Spring"
"Ah, so in 6 months?"
"No, I meant German Spring, not Chilean Spring"
"Ah, so 15th of Autumn, got it!"
baxtr
9 months ago
Well, not quite. I’m merely proposing to have January 1st on spring starting day (northern hemisphere).
diggan
9 months ago
It'd be kind of weird to have the coldest season (for me and my fellow countrymen) to be called Spring and then the second-coldest season called Winter, and we live in the northern hemisphere :)
BenjiWiebe
9 months ago
Why northern hemisphere and not southern?
scotty79
9 months ago
Because most humans live in the northern hemisphere?
alpinisme
9 months ago
I’m sure there are more aesthetically gratifying ways to align the seasons to the calendar but we’re less than two weeks off from having the first day of winter be the first of the year.
pinkmuffinere
9 months ago
And even then, what is the significance of “first day of winter”, “last day of spring”, etc. Aren’t these just arbitrary dates?
baxtr
9 months ago
No these days are aligned with the position of earth relative to the sun.
pinkmuffinere
9 months ago
Interesting! That makes sense, and I’m pleasantly surprised — I didn’t realize we _actually_ use a date with a reason, instead of just tradition
BenjiWiebe
9 months ago
Adding to baxtr's comment: first day of spring = days (daylight) lengthening, day and night equal. First day of summer, longest day/shortest night. First day of autumn, days shortening, day and night equal. First day of winter, shortest day/longest night.
baxtr
9 months ago
But that’s exactly what I am bemoaning :) the first day of winter should not be the start of the year.
krisoft
9 months ago
Why?
Zenzero
9 months ago
If you do have a deep interest in this it would probably help to learn immunology on a more detailed level. My suspicion is that articles like the one you linked feel unsatisfactory because they say things like this
> But if our immunity is “restructured” in some way every few months, we would again expect all viral infections to peak at the same time
It is clear the author doesn't have a good understanding of basic immunology.
Much of the mystique falls away when you understand concepts such as adaptive immunity (how it develops and is retained), antigenic drift, environmental conditions (on the host) that improve transmission, etc.
quikoa
9 months ago
While I haven't dived deep into this topic according to this article viral seasonality tracks with the migration of wild birds: https://pubmed.ncbi.nlm.nih.gov/27324078/