1. American Academy of Pediatrics https://www.healthychildren.org/English/health-issues/vaccine-preventable-diseases/Pages/VaricellaChickenPox.aspx?gclid=EAIaIQobChMIkaPO1rXa5QIVzbTtCh0fZgWKEAAYAiAAEgJdmvD_BwE
2. Centers for Disease Control and Prevention, USA https://www.cdc.gov/chickenpox/index.html
3. DermNet, New Zealand https://www.dermnetnz.org/topics/chickenpox/
4. Family Doctor, USA https://familydoctor.org/condition/chickenpox/
5. Patient Info, UK https://patient.info/doctor/chickenpox-pro