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Coronavirus typically has a spike that starts in December and lasts until February. There are many theories about why this happens, but reduced Vitamin D level

Coronavirus typically has a spike that starts in December and lasts until February. There are many theories about why this happens, but reduced Vitamin D levels has substantial proof behind it.

dragontamer 5y ago
There's nothing "typical" about COVID19 yet. But yes, there was a spike in December 2019, and another spike in December 2020. So we all are expecting a spike in December 2021.
- kudosycnews 5y ago
  Covid 19 is a kind of Coronavirus. Coronavirus is more than Covid 19, most if not all "cold" were caused by coronavirus
  - dragonwriter 5y ago
    > most if not all "cold" were caused by coronavirus No, just a significant minority: https://www.webmd.com/cold-and-flu/cold-guide/common_cold_causes https://www.webmd.com/cold-and-flu/cold-guide/common_cold_ca...
- beerandt 5y ago
  >There's nothing "typical" about COVID19 yet. Corona viruses are a family of viruses that extends far beyond the particular virus responsible for the current pandemic/epidemic. Corona viruses are the #2 family responsible for the common (viral) cold, behind rhinoviruses (In the ballpark of 10-20% and 50-60% respectively, iirc, but definitely rank #2 & #1). So there is a great deal of historical knowledge about the corona family of viruses, just not necessarily specific to this corona virus and it's variants. In the context of looking for seasonal patterns in respiratory viruses, it's the first place you'd look in trying to find common traits. ETA: WebMD says 10-40% Rhino, 20% Corona, 20% RSV/parainfluenza, and 20-30% "other".
- ZanyProgrammer 5y ago
  Last year cases started going up at least in November.
- dredmorbius 5y ago
  There is previous epidemiological history of other coronavirus variants, prior to the emergence of SARS-COV-2. That's what the comment above is referring to. See for example: "Epidemiology and Clinical Presentations of Human Coronavirus NL63 Infections in Hong Kong Children" Authors: Ting Fan Leung, Chung Yi Li, Wai Yip Lam, Gary W. K. Wong, Edmund Cheuk, Margaret Ip, Pak Cheung Ng, and Paul K. S. Chan ASM Journals, Journal of Clinical Microbiology, Vol. 47, No. 11 https://doi.org/10.1128/JCM.00832-09 https://doi.org/10.1128/JCM.00832-09 https://journals.asm.org/doi/10.1128/jcm.00832-09?permanently=true https://journals.asm.org/doi/10.1128/jcm.00832-09?permanentl...
bellyfullofbac 5y ago
In the northern hemisphere? My theory is in spring/summer/fall people are hanging out outside, and as winter comes they think "I've been fine socializing the last few months, hanging out inside will be safe." and socialize indoors, where the lack of fresh air means the virus will spread...
- fy20 5y ago
  This seems somewhat true based on spikes in the Southern US during the summer (people stay inside where there is AC), but doesn't seem to be the whole story. If that was the case, you would expect to see similar spikes in areas where there is say a week of rain (should be easy to measure in parts of Europe). In my country - where for the last month we've basically had no sun, just clouds - there is a distinct spike around winter, which would follow nicely with the vitamin D theory. However in places like Southern Europe, which still has a good amount of sun during winter, there are similar spikes.

Coronavirus typically has a spike that starts in December and lasts until February. There are many theories about why this happens, but reduced Vitamin D levels has substantial proof behind it.

dragontamer 5y ago

There's nothing "typical" about COVID19 yet. But yes, there was a spike in December 2019, and another spike in December 2020. So we all are expecting a spike in December 2021.

kudosycnews 5y ago
Covid 19 is a kind of Coronavirus. Coronavirus is more than Covid 19, most if not all "cold" were caused by coronavirus
- dragonwriter 5y ago
  > most if not all "cold" were caused by coronavirus No, just a significant minority: https://www.webmd.com/cold-and-flu/cold-guide/common_cold_causes https://www.webmd.com/cold-and-flu/cold-guide/common_cold_ca...
beerandt 5y ago
>There's nothing "typical" about COVID19 yet. Corona viruses are a family of viruses that extends far beyond the particular virus responsible for the current pandemic/epidemic. Corona viruses are the #2 family responsible for the common (viral) cold, behind rhinoviruses (In the ballpark of 10-20% and 50-60% respectively, iirc, but definitely rank #2 & #1). So there is a great deal of historical knowledge about the corona family of viruses, just not necessarily specific to this corona virus and it's variants. In the context of looking for seasonal patterns in respiratory viruses, it's the first place you'd look in trying to find common traits. ETA: WebMD says 10-40% Rhino, 20% Corona, 20% RSV/parainfluenza, and 20-30% "other".
ZanyProgrammer 5y ago
Last year cases started going up at least in November.
dredmorbius 5y ago
There is previous epidemiological history of other coronavirus variants, prior to the emergence of SARS-COV-2. That's what the comment above is referring to. See for example: "Epidemiology and Clinical Presentations of Human Coronavirus NL63 Infections in Hong Kong Children" Authors: Ting Fan Leung, Chung Yi Li, Wai Yip Lam, Gary W. K. Wong, Edmund Cheuk, Margaret Ip, Pak Cheung Ng, and Paul K. S. Chan ASM Journals, Journal of Clinical Microbiology, Vol. 47, No. 11 https://doi.org/10.1128/JCM.00832-09 https://doi.org/10.1128/JCM.00832-09 https://journals.asm.org/doi/10.1128/jcm.00832-09?permanently=true https://journals.asm.org/doi/10.1128/jcm.00832-09?permanentl...

bellyfullofbac 5y ago

In the northern hemisphere? My theory is in spring/summer/fall people are hanging out outside, and as winter comes they think "I've been fine socializing the last few months, hanging out inside will be safe." and socialize indoors, where the lack of fresh air means the virus will spread...

fy20 5y ago
This seems somewhat true based on spikes in the Southern US during the summer (people stay inside where there is AC), but doesn't seem to be the whole story. If that was the case, you would expect to see similar spikes in areas where there is say a week of rain (should be easy to measure in parts of Europe). In my country - where for the last month we've basically had no sun, just clouds - there is a distinct spike around winter, which would follow nicely with the vitamin D theory. However in places like Southern Europe, which still has a good amount of sun during winter, there are similar spikes.