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Second infections, on average, have slightly worse outcomes then first infections among the unvaccinated.

It's a small sample, but it was done on data available in 2020, which was before vaccines were available.

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.

Worth bearing in mind, 19% -> 3 patients, 12.5% -> 2 patients.

Indeed, small sample size!

Went looking for later studies with larger population sizes and found this review 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.