Variants This report says that Omicron is much much more likely than Delta to cause a sore throat, but much much less likely to cause loss of smell. Transmission This article reports on a study which says that 10% of people are still infectious for at least ten days. Genetics This article reports that scientists… Continue reading 2022-01-14 General
Category: Variants
2022-01-13 General
Variants Everybody knows by now that Omicron appears to be more mild, but how much of that is because lots of people have partial immunity? This preprint looked at South African Omicron infections and found that when you controlled for vaccination status, Omicron is about 25% as severe. Vaccines This article says that inactivated virus… Continue reading 2022-01-13 General
2022-01-11 General
Variants This preprint says that Omicron is less virulent than Delta: ~50% less likely to get admitted to hospital from the emergency room; ~75% less likely to go to the ICU; ~70% shorter hospital stay. Note that something I’m seeing is people not seeing a shorter hospital stay in the UK, e.g. in this tweet.… Continue reading 2022-01-11 General
2022-01-05 General
Vaccines Studies of the effectiveness of boosters against Omicron in humans (as opposed to test tubes) are starting to come out, and they are not as encouraging as one would like. This preprint from the UK says in people who got AZ, a Pfizer booster is 89.1% effective against symptomatic infection and for those who… Continue reading 2022-01-05 General
2022-01-01/02/03/04 General
Happy New Year! Measures In the USA, the US CDC decided that five days was enough time to isolate. Per this tweet, five days later, the number of COVID-19 transmissions in hospitals went up: In BC, we just dropped to five-day isolation (as long as you have no symptoms). It would be interesting to see… Continue reading 2022-01-01/02/03/04 General
2021-12-30 General
Mitigation Measures This article says that people can now apply for the federal Canada Worker Lockdown Benefit of up to $300/week, retroactive to 19 Dec. Variants This report from Ontario Public Health says that, after adjusting for vaccination status, the risk of severe illness from Omicron is 54% that from Delta. This preprint (from August)… Continue reading 2021-12-30 General
2021-12-29 General
Variants There continue to be studies in test tubes and lab rodents which all show pretty convincingly that Omicron does not infect the lungs as well as previous versions. This preprint says that T cells from vaccination still have 70-80% of their protection against Omicron (which is probably why breakthrough cases are mild). Transmission This… Continue reading 2021-12-29 General
2021-12-25/26/27/28 General
Variants There has been difficulty figuring out how badly Omicron is going to hit the hospital system first because it is a lagging indicator, second because Omicron affects vaccinated and unvaccinated people so differently, and third because of poor-quality data around the holidays. Still, there are hints that, as this tweet from New York says,… Continue reading 2021-12-25/26/27/28 General
2021-12-23 General
Variants I have been frustrated with some of the talk around Omicron’s virulence, and this tweet made me realize what my problem was: we shouldn’t be talking about THE virulence (usually expressed as the Case Hospitalization Rate or CHR) as a single number. There is a different CHR for the general population (the observed virulence)… Continue reading 2021-12-23 General
2021-12-21 General
Variants More qualified good news: this preprint out of South Africa says that Omicron is only 70% as likely to send someone to the hospital as Delta. All the same caveats I’ve made previously apply, though. This Twitter thread does an estimate of the Case Hospitalization Rate (CHR) in New South Wales, Australia. This is… Continue reading 2021-12-21 General