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A new study finds that social media use in itself does not harm the mental health of young people. But if its frequent use erodes sleep, prevents physical activity and exposes teenage girls to cyberbullies, there is a significant risk of poor mental wellbeing. Psychiatrist Dr Dasha Nicholls of Imperial College School of Medicine explains the findings.

Nada Tawfik reports on the problems that disabled people face in getting good dental care in the United States. Many dentists refuse to have them on the books. A new centre at New York University of Dentistry provides special facilities to care for this group of patients and trains dental students not to fear and reject disabled clients.

Why has dengue fever exploded this year in SE Asia and caused Philippines to declare national epidemic? We talk to Dr Sophie Yacoub, Head of the Dengue Research Group at the Oxford University Clinical Research Unit in Vietnam and Dr Gundo Weiler at the WHO in the Philippines.

³ÉÈË¿ìÊÖ News correspondent James Gallagher joins Claudia in the studio to talk about Ebola now being regarded as a curable disease, an experimental vaccine against chlamydia, and why young men have trouble with eating enough fruit and vegetables.

(Photo caption: Girl reading her mobile phone under bedcovers – credit: Getty Images)

Health Check was presented by Claudia Hammond

Producer: Andrew Luck-Baker