Chlamydia is the most common STD in the world, with an estimated 131 million new cases each year.

Vasectomy is the most effective method of contraception, with a failure rate of less than 1%.

Unsafe abortion is the leading cause of maternal death worldwide, accounting for an estimated 7 million deaths each year.

The recommended age for women to begin cervical cancer screening is 21 years old.

Breast cancer is the most common type of cancer among women worldwide, accounting for an estimated 2.1 million new cases each year.

Lung cancer is the most common type of cancer among men worldwide, accounting for an estimated 1.8 million new cases each year.

Road traffic accidents are the leading cause of death among adolescents worldwide, accounting for an estimated 1.3 million deaths each year.

Pneumonia is the leading cause of death among children under the age of 5 worldwide, accounting for an estimated 1.4 million deaths each year.

Heart disease is the leading cause of death among adults aged 65 and older worldwide, accounting for an estimated 17.9 million deaths each year.

Heart disease is the leading cause of death worldwide, accounting for an estimated 17.9 million deaths each year.

Vitamin A deficiency is the most common cause of blindness in children worldwide, accounting for an estimated 500,000 new cases each year.

Otitis media is the most common cause of deafness in children worldwide, accounting for an estimated 31 million new cases each year.

Mental health disorders are the most common cause of disability worldwide, accounting for an estimated 10% of the global burden of disease.

Tuberculosis is the most common cause of death among people living with HIV/AIDS, accounting for an estimated 30% of all deaths.

Cerebral malaria is the most common cause of death among people living with malaria, accounting for an estimated 20% of all deaths.