Cancer Breakthroughs and the Uneven Progress of Cancer Prevention and Treatment

Strategic Insights -

Cancer has gone from a death sentence to a manageable, sometimes preventable, disease. According to the World Health Organization (WHO), the age-adjusted cancer death rate in the US declined by one-third between 1991 and 2021, saving more than four million lives. Meanwhile, the number of people dying from cancer doubled globally from 5 million in 1980 to 10 million in 2021, largely due to population growth and aging.

Key Takeaways:

  • The number of cancer deaths in the US fell by one-third between 1991 and 2021, saving more than four million lives.
  • The decline in cancer deaths is largely attributed to improved prevention, detection, and treatments.
  • Half of the averted deaths came from people quitting smoking due to taxes and public awareness campaigns.
  • Mammogram screening, colonoscopies, blood tests, and smear tests have increased detection rates, leading to fewer late-stage diagnoses.
  • Vaccines have proved highly effective against several cancers, such as cervical cancer, which has seen a nearly 90% reduction in prevalence in England.
  • Leukaemia has seen significant improvement in survival rates, with 85% of children under 10 now surviving more than five years after diagnosis.
  • New vaccines tailored to individual DNA have shown promise in preventing cancer recurrence, with a 44% decrease in post-surgical recurrence or death in melanoma patients.
  • However, progress is uneven, with little improvement in survival rates for patients with oesophagus, stomach, and lung cancer.
  • 60% of cancers are not explained by known risk factors, and some cancers develop resistance to treatments.

Statistics:

  • 5 million people died from cancer in 1980
  • 10 million people died from cancer in 2021
  • The number of cancer deaths in the US fell by 33% between 1991 and 2021.
  • 4 million lives saved in the US due to improved cancer prevention, detection, and treatments.
  • 90% reduction in cervical cancer prevalence in England due to vaccination.
  • 85% of children with leukaemia now survive more than five years after diagnosis.
  • 44% decrease in post-surgical recurrence or death in melanoma patients with personalized vaccine.

Sources:

  • WHO (no specific date mentioned)
  • "Who smoked?" by the American Cancer Society, Sep 2022
  • "Leukemia and Lymphoma Society (LLS)"
  • "Cancer Research UK"