5 ms·

Maybe it is lower because it is the second infection some had.

richardatlarge 5y ago
Wouldn’t that be inconsistent with the other, related data: Quote: “National data show an exponential increase in both new infections and test positivity rates during the first three weeks of this wave, indicating a highly transmissible variant with rapid community spread of infection.”
- deleted 5y ago
  [deleted]
- croes 5y ago
  Maybe "new infection" doesn't mean first infection.
giantg2 5y ago
Or they were vaccinated
- elsherbini 5y ago
  South Africa has <25% vaccintion rate. "South Africa has a better vaccination rate than most countries on the continent: Just under one-quarter of the population has been fully vaccinated" [1] [1] https://www.nytimes.com/2021/11/28/world/africa/south-africa-omicron-vaccination.html https://www.nytimes.com/2021/11/28/world/africa/south-africa...
- ageitgey 5y ago
  For what it's worth, the vaccination rate in South Africa is low. It's only around 25% for the original course with little to no boosters done.
vkou 5y ago
Edit: double post, reference edited in above.
- tylerscott 5y ago
  Source?
  - deleted 5y ago
    [deleted]
vkou 5y ago
Second infections, on average, have slightly worse outcomes then first infections among the unvaccinated. https://jim.bmj.com/content/69/6/1253 https://jim.bmj.com/content/69/6/1253 It's a small sample, but it was done on data available in 2020, which was before vaccines were available.
- dsizzle 5y ago
  That link shows most (69%) have similar outcomes. 68.8% -- 19% had worse symptoms and 12.5% had milder symptoms. Small sample size, but even similar result is somewhat surprising -- I would've thought the 2nd infection would be weaker.
  - rich_sasha 5y ago
    Worth bearing in mind, 19% -> 3 patients, 12.5% -> 2 patients.
    - dsizzle 5y ago
      Indeed, small sample size!
  - dsizzle 5y ago
    Went looking for later studies with larger population sizes and found this review https://www.sciencedirect.com/science/article/pii/S2049080121010803 https://www.sciencedirect.com/science/article/pii/S204908012... It's not that much larger -- I guess reinfections are hard to find -- but surprisingly this found that ICU admission was higher for reinfections.
  - deleted 5y ago
    [deleted]

Wouldn’t that be inconsistent with the other, related data: Quote: “National data show an exponential increase in both new infections and test positivity rates during the first three weeks of this wave, indicating a highly transmissible variant with rapid community spread of infection.”

deleted 5y ago
[deleted]
croes 5y ago
Maybe "new infection" doesn't mean first infection.

giantg2 5y ago

Or they were vaccinated

elsherbini 5y ago
South Africa has <25% vaccintion rate. "South Africa has a better vaccination rate than most countries on the continent: Just under one-quarter of the population has been fully vaccinated" [1] [1] https://www.nytimes.com/2021/11/28/world/africa/south-africa-omicron-vaccination.html https://www.nytimes.com/2021/11/28/world/africa/south-africa...
ageitgey 5y ago
For what it's worth, the vaccination rate in South Africa is low. It's only around 25% for the original course with little to no boosters done.

vkou 5y ago

Edit: double post, reference edited in above.

tylerscott 5y ago
Source?
- deleted 5y ago
  [deleted]

vkou 5y ago

Second infections, on average, have slightly worse outcomes then first infections among the unvaccinated. https://jim.bmj.com/content/69/6/1253 https://jim.bmj.com/content/69/6/1253 It's a small sample, but it was done on data available in 2020, which was before vaccines were available.

dsizzle 5y ago
That link shows most (69%) have similar outcomes. 68.8% -- 19% had worse symptoms and 12.5% had milder symptoms. Small sample size, but even similar result is somewhat surprising -- I would've thought the 2nd infection would be weaker.
- rich_sasha 5y ago
  Worth bearing in mind, 19% -> 3 patients, 12.5% -> 2 patients.
  - dsizzle 5y ago
    Indeed, small sample size!
- dsizzle 5y ago
  Went looking for later studies with larger population sizes and found this review https://www.sciencedirect.com/science/article/pii/S2049080121010803 https://www.sciencedirect.com/science/article/pii/S204908012... It's not that much larger -- I guess reinfections are hard to find -- but surprisingly this found that ICU admission was higher for reinfections.
- deleted 5y ago
  [deleted]