2021-07-28 General

Vaccines On 21 July’s General blog post, I reported a study which suggested that vaccine effectiveness waned over time. This tweet thread (by one of the original authors) says they don’t think that’s accurate: that they got the denominator wrong. The vaccines still work well. Pfizer has released six-month data. Tl;dr: the vaccine works really… Continue reading 2021-07-28 General

2021-07-23 General

Vaccines This article says that data from Israel shows that the effectiveness of the Pfizer vaccine against infection (not against severe disease!) might be waning. Take that with a big grain of salt, however. There are a number of reasons why this should not be scary to you, even if you got the Pfizer vax.… Continue reading 2021-07-23 General

2021-07-22 General

Variants This article suggests that one reason why Quebec is seeing so few Delta cases compared to other provinces is because they’ve got more of something else: A.2.5, first seen in Central America. It’s not a VOC yet, but they are keeping their eye on it. Vaccines This study of Pfizer found that neutralizing antibodies… Continue reading 2021-07-22 General

2021-07-17/18 General

Vaccines Canada has passed the USA in percentage of population that is fully vaxxed. This is bittersweet. I mean, yay us, but also it is so sad that hesitancy is so high in the US. Transmission This study found that patients caught COVID-19 from infected roommates 39% of the time. However, they also found that… Continue reading 2021-07-17/18 General

2021-07-13 General

Vaccination Half of eligible Canadians have gotten their second dose, woohoo! Transmission This study looked at viral loads over time and found three interesting things: The total infectiousness (load integrated over time) was very different between different people. The viral load went up in saliva before it went up in nasal mucous. They suggest that… Continue reading 2021-07-13 General