[1] Böhmer MM, Buchholz U, Corman VM, Hoch M, Katz K, Marosevic DV, et al. Investigation of a COVID-19 outbreak in Germany resulting from a single travel-associated primary case: a case series. The Lancet Infectious Diseases 2020;20(8):920-8.
[2] Buthe T, Messerschmidt L, Cheng C. Policy responses to the coronavirus in Germany. The World Before and After COVID-19: Intellectual Reflections on Politics, Diplomacy and International Relations, edited by Gian Luca Gardini Stockholm–Salamanca: European Institute of International Relations 2020.
[3] German Federal Government. Measures by the Federal Government to contain the spread of the COVID-19 pandemic and address its impacts, https://www.bundesregierung.de/resource/blob/975226/1753912/4a0014f469023200f7cf7ba3e8ed3203/2020-05-18-massnahmen-englisch-data.pdf. Berlin: German Federal Government; 2021.
[4] German Federal Government. Coronavirus-Pandemie (SARS-CoV-2): Chronik bisheriger Maßnahmen und Ereignisse, https://www.bundesgesundheitsministerium.de/coronavirus/chronik-coronavirus.html. Berlin: German Federal Government; 2021.
[5] Robert Koch Institute. Coronavirus disease 2019 (COVID-19): Daily situation report of the Robert Koch Institute, https://www.rki.de/DE/Content/InfAZ/N/Neuartiges_Coronavirus/Situationsberichte/Apr_2021/2021-04-22-en.pdf. Berlin: Robert Koch Institute; 2021.
[6] Wetzstein M, Rommel A, Lange C. Pflegende Angehörige - Deutschlands größter Pflegedienst. Berlin: Robert Koch Institute; 2015.
[7] Johansen S, Cvancarova M, Ruland C. The effect of cancer patients' and their family caregivers' physical and emotional symptoms on caregiver burden. Cancer Nursing 2018;41(2):91-9.
[8] Ribe J, Salamero M, Perez-Testor C, Mercadal J, Aguilera C, Cleris M. Quality of life in family caregivers of schizophrenia patients in Spain: caregiver characteristics, caregiving burden, family functioning, and social and professional support. International Journal of Psychiatry in Clinical Practice 2018;22(1):25-33.
[9] Ge L, Mordiffi SZ. Factors associated with higher caregiver burden among family caregivers of elderly cancer patients: a systematic review. Cancer Nursing 2017;40(6):471-8.
[10] Russell BS, Hutchison M, Tambling R, Tomkunas AJ, Horton AL. Initial challenges of caregiving during COVID-19: caregiver burden, mental health, and the parent-child relationship. Child Psychiatry & Human Development 2020;51(5):671-82.
[11] Killen A, Olsen K, McKeith IG, Thomas AJ, O'Brien JT, Donaghy P, et al. The challenges of COVID-19 for people with dementia with Lewy bodies and family caregivers. International Journal of Geriatric Psychiatry 2020.
[12] Cohen G, Russo MJ, Campos JA, Allegri RF. Living with dementia: increased level of caregiver stress in times of COVID-19. International Psychogeriatrics 2020;32(11):1377-81.
[13] Eggert S, Teubner C, Budnick A, Gellert P, Kuhlmey A. Pflegende Angehörige in der COVID-19-Krise. Ergebnisse einer bundesweiten Befragung. Berlin: Zentrum für Qualität in der Pfleg; 2020.
[14] German Federal Government. Zweites Gesetz zum Schutz der Bevölkerung bei einer epidemischen Lage von nationaler Tragweite, https://www.bundesgesundheitsministerium.de/covid-19-bevoelkerungsschutz-2.html. Berlin: German Federal Government; 2020.
[15] Parohan M, Yaghoubi S, Seraji A, Javanbakht MH, Sarraf P, Djalali M. Risk factors for mortality in patients with Coronavirus disease 2019 (COVID-19) infection: a systematic review and meta-analysis of observational studies. The Aging Male 2020;1-9.
[16] Sousa H, Frontini R, Ribeiro O, Paul C, Costa E, Amado L, et al. Caring for patients with end-stage renal disease during COVID-19 lockdown: What (additional) challenges to family caregivers? Scandinavian Journal of Caring Sciences 2021.
[17] Budnick A, Hering C, Eggert S, Teubner C, Suhr R, Kuhlmey A, et al. Informal caregivers during the COVID-19 pandemic perceive additional burden: findings from an ad-hoc survey in Germany. BMC Health Services Research 2021;21(1):1-11.
[18] Rothgang H, Wolf-Ostermann K, Domhoff D, Friedrich AC, Heinze F, Heß M, et al. Zur Situation der häuslichen Pflege in Deutschland während der Corona-Pandemie: Ergebnisse einer Online-Befragung von informellen Pflegepersonen im erwerbsfähigen Alter. Bremen: SOCIUM; 2020.
[19] Kuckartz U. Qualitative text analysis: A guide to methods, practice and using software. Sage; 2014.
[20] Hookway N. Entering the blogosphere': some strategies for using blogs in social research. Qualitative research 2008;8(1):91-113.
[21] Jeon YH, Brodaty H, Chesterson J. Respite care for caregivers and people with severe mental illness: literature review. Journal of Advanced Nursing 2005;49(3):297-306.
[22] Reinhard SC, Given B, Petlick NH, Bemis A. Supporting family caregivers in providing care. Patient safety and quality: An evidence-based handbook for nurses 2008.
[23] Mazzi MC, Iavarone A, Musella C, De Luca M, de Vita D, Branciforte S, et al. Time of isolation, education and gender influence the psychological outcome during COVID-19 lockdown in caregivers of patients with dementia. European geriatric medicine 2020;11(6):1095-8.
[24] Gallagher S, Wetherell MA. Risk of depression in family caregivers: unintended consequence of COVID-19. BJPsych open 2020;6(6).
[25] Kent EE, Ornstein KA, Dionne-Odom JN. The family caregiving crisis meets an actual pandemic. Journal of Pain and Symptom Management 2020;60(1):e66-e69.
[26] Lightfoot E, Moone RP. Caregiving in times of uncertainty: Helping adult children of aging parents find support during the COVID-19 Outbreak. Journal of Gerontological Social Work 2020;63(6-7):542-52.
[27] Phillips D, Paul G, Fahy M, Dowling-Hetherington L, Kroll T, Moloney B, et al. The invisible workforce during the COVID-19 pandemic: Family carers at the frontline. HRB Open Research 2020;3.
[28] Rohleder B. Social-Media-Trends 2018, https://www.bitkom.org/sites/default/files/pdf/Presse/Anhaenge-an-PIs/2018/180227-Bitkom-PK-Charts-Social-Media-Trends-2.pdf. Berlin: Bundesverband Informationswirtschaft, Telekommunikation und neue Medien; 2018.
[29] Faktenkontor. Wie die Deutschen im Web 2.0 surfen, https://www.faktenkontor.de/pressemeldungen/wie-die-deutschen-im-web-2-0-surfen/. Hamburg: Faktenkontor; 2019.
[30] Rothgang H, Müller R, Runte R, Unger R. Pflegereport 2018 Schriftenreihe zur Gesundheitsanalyse. Berlin: Barmer; 2018.