Covid-19 has overwhelmed health care systems and disrupted Tuberculosis care all over the world.

It begins with a mild fever and malaise, followed by a painful cough and shortness of breath. The infection prospers in crowds, spreading to people in close reach. Containing an outbreak requires contact tracing, as well as isolation and treatment of the sick for weeks or months.

Covid-19 risks derailing all our efforts and taking us back to where we were 20 years ago. Fear of the coronavirus and the shuttering of clinics have kept away many patients struggling with H.I.V., TB and malaria, while restrictions on air and sea travel have severely limited delivery of medications to the hardest-hit regions.

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