Mitigation Measures This US CDC report says that counties with school mask mandates had lower absolute pediatric case rates (16.32 per 100K/day vs. 34.85 per 100K/day) and a lower increase in cases after school started. This (different) US CDC report says that counties without a mask mandate in schools had a 3.5x higher chance of… Continue reading 2021-09-24 General
Category: General
2021-09-23 General
Vaccines This long and highly technical preprint also says that the MMR vaccine gives some protection against and that the Tdap (Tetanus, diphtheria, and pertussis) vaccine does. The authors did two things: They took T cells from blood which had SARS-CoV-2 antibodies (either from infection or vaccination) and added either MMR or Tdap vaccines, and… Continue reading 2021-09-23 General
2021-09-22 General
Vaccines In this study, the authors made pseudoviruses — things which have SARS-CoV-2 spikes on them but which can’t infect people, and “mutated” the spikes. They were able to find a mutant spike that were almost completely resistant to antibodies from either people who had had COVID-19 and had not been vaccinated or who had… Continue reading 2021-09-22 General
2021-09-21 General
Mitigation Measures The land border into the USA from Canada will remain closed to non-essential non-Americans until at least 21 October. Vaccines This preprint says that the MMR (measles, mumps, and rubella) vaccine has a vaccine effectiveness against symptomatic COVID-19 infection of 48% and 76% effectiveness against severe disease. I think this is huge news,… Continue reading 2021-09-21 General
2021-09-18/19/20 General
It was a busy weekend, it’s going to be a very busy day for me. I wasn’t going to post today, but there’s great news! Vaccines Pfizer/BioNTech announced that their trial in kids from 5-11 years old has finished, and the results look good!
2021-09-17 General
COVID-19 Origins This preprint says they have found a bat coronavirus which looks really close to SARS-CoV-2. It looks to me like that’s the origin! Does this mean an end to speculation about SARS-CoV-2 coming from a Chinese lab? Oh hell no, because they have too much fun with conspiracy theories and because it’s not… Continue reading 2021-09-17 General
2021-09-16 General
Vaccines IF YOU ARE PREGNANT, GET A VACCINE. This article says that pregnant people are five times more likely to get admitted to hospital and ten times more likely to end up in the ICU. According to this article, Health Canada has approved vaccine names: Moderna -> Spikevax Pfizer -> Comirnaty AZ -> Vaxzevria With… Continue reading 2021-09-16 General
2021-09-15 General
Vaccines I mentioned a study from England yesterday which looked at waning immunity. This tweet thread looks more closely, and there’s good stuff in the report that I missed. First, here’s the original study. Yes, it looks you’ve got a significant loss in effectiveness against infection if you look at the over-sixteens, but if you… Continue reading 2021-09-15 General
2021-09-14 General
Vaccines This article has a graph of AZ and Pfizer’s effectiveness over time for old folks. It’s not pretty (but remember that they used a short dose interval, and Canada mostly used a long interval). Even for younger people, it’s not great news: This preprint says that people who have a spare tire around their… Continue reading 2021-09-14 General
2021-09-11/12/13 General
Transmission This report says that seroprevalence of COVID-19 antibodies from infection in Canadian blood donors went up to 4.5%, up from 4.0% in May. (How can they tell the difference? Vaccines only make antibodies to the spike protein, so if there are antibodies to some other part of the SARS-CoV-2 virus, then it was acquired… Continue reading 2021-09-11/12/13 General