https://www.washingtonpost.com/health/2022/11/10/covid-reinfection-complications/
The study included a review of the medical records of 5.8 million patients, 443,588 of whom had been infected once, and 40,947 who had been infected two or more times. The median time between the first and second infection was 191 days. Compared with people who experienced only one infection, those who were reinfected had a twofold increased risk of death, threefold increased risk of hospitalization, twofold increased risk of long covid, threefold increase in risk of heart problems and blood clotting disorders, and twofold increased risk of fatigue.
https://time.com/6196814/covid-19-reinfections-omicron-risks/
By now, you may know—or be—someone who has had COVID-19 two, three, or even four times. Omicron and its subvariants, which are highly contagious and contain mutations that may allow them to evade the body’s vaccine- and infection-acquired immune defenses, have made reinfections an unfortunate but common part of life.
What if You Get COVID-19 More Than Once?
A growing number of people are getting COVID-19 twice, 3 times, even 4. How risky are repeat infections?
https://www.everydayhealth.com/coronavirus/what-if-you-get-covid-19-more-than-once/
更可怕的是再次感染時更糟：死亡危險增倍，住院機會增兩倍
Repeat COVID is riskier than first infection, study finds
Reinfected patients had a more than doubled risk of death and a more than tripled risk of hospitalization compared with those who were infected with COVID just once. They also had elevated risks for problems with lungs, heart, blood, kidneys, diabetes, mental health, bones and muscles, and neurological disorders, according to a report published in Nature Medicine.
