The Long-Covid-Syndrome with its diverse symptoms occurs during or after a COVID-19 infection, sometimes twelve weeks later. The occurrence is also characteristic after a mild or moderate progression and/or a phase of interim improvement. Shifting and overlapping clusters of symptoms can affect any system in the body.
Different studies document very different findings of the long-Covid-Syndrome, depending on the type:
- Greenhalgh, T., Knight, M., Court, C., Buxton, M., & Husain, L. (2020). Management of post-acute Covid-19 in primary care. BMJ, 370:m3026. DOI: https://doi.org/10.1136/bmj.m3026
- Lopez-Leon, S., Wegman-Ostrosky, T., Perelman, C., Sepulveda, R., Rebolledo, P.A., Cuapio, A., & Villapol, S. (2021). More than 50 long-term effects of Covid-19: a systematic review and meta-analysis. medRxiv, 2021.01.27.21250617. DOI: https://doi.org/10.1101/2021.01.27.21250617
- Huang, C., Huang, L., Wang, Y., Li, X., Ren, L., Gu, X.,& Cao, B. (2021). 6‑month consequences of Covid-19 patients discharged from hospital: a cohort study. Lancet, 397, 220–232. DOI: doi.org/10.1016/ S0140-6736(20)32656–8
- Townsend, L., Dowds, J., O’Brien, K., Sheill, G., Dyer, A., O’Kelly, B., … & Bannan, C. (2021). Persistent poor health post-Covid-19 is not associated with respiratory complications or initial severity. AnnalsATS. DOI: https://doi.org/10.1513/AnnalsATS.202009–1175OC
- Mahmud, R., Rahman, M., Rassel, M., Monayem, F., Sayeed, S., Islam, M. S., & Islam, M. M. (2021). Post-Covid-19 syndrom among symptomatic Covid-19 patients. A prospective cohort study in a tertiary care center of Bangladesh. PLOS ONE, 16(4). DOI: https:// doi.org/10.1371/journal.pone.0249644
The current study by the Techniker Krankenkasse (TK)
According to a current analysis by Techniker Krankenkasse (TK), around one percent of their employed insured persons were certified as long-Covid in 2021. In 2020, a COVID-19 infection was detected in these medium PCR tests. The average duration of the absence from work was 105 days, the average of the insured was only 14.6 days a year. The TK suspects a high number of unreported cases due to imprecise definitions of the long-term consequences and the abundance of long-Covid symptoms.
Long-Covid — risk decreases
According to a long-term study of 2,560 employees in nine Italian healthcare facilities from March 2020 to April 2022, the risk of long-Covid illness was 48 percent in the first wave and has now fallen to 17 percent.
A group of researchers from King’s College London examined more than 7,000 long-Covid sufferers and published their results in the journal “Lancet”. As a result, the risk of long-term consequences of a Covid-19 disease caused by the Omicron virus variant fell by around 50 percent compared to the Delta variant.
- Techniker Krankenkasse (TK)
- The Lancet