Vaccines
In this preprint, they found antibody levels post-vax were (slightly) higher in women, younger people, Moderna vaccinees (vs. Pfizer), people who had prior COVID-19, and those who had significant side-effects.
If I understand this table correctly, you are more likely to have significant side effects after dose 1 if you were over 60, female, got Moderna, and already had COVID-19.
You are more likely to have significant side effects after dose 2 if you were younger, female, got Moderna, and had not had COVID-19.
Transmission
This preprint found that really little kids (0 to 3 years old) transmitted COVID-19 much more than teenagers. Intuitively, this makes sense to me: adults are frequently putting their faces right up next to the little kids’ faces (holding them close especially when they are sick), while teenagers don’t want anything to do with their parents. 😉
Long COVID
This article is long and technical and somewhat over my head, but it reviews research linking both Long COVID and myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) to chemical imbalances in the blood, specifically in the oxidant/anti-oxidant balance.
Recommended Reading
This is an excellent summary article of the important things we we know and don’t know about this pandemic.
This article talks about what we know and don’t know about Long COVID in vaccinated people. Spoiler: we don’t know much.
This article is about how the USA couldn’t keep up with contract tracing in part because their IT wasn’t up to the task.
This article talks about correlates of protection: what does that mean, what do we know, what do we not know.