Urbanization and Health

Urbanization Overview - City Slicker Stats

• Urbanization Defined: Process of ↑ population proportion in urban areas, plus societal adaptation to this shift.
• Global Scenario: >50% world population urban; developing countries show most rapid urbanization.
• India - Urban Snapshot (Census 2011):
  • Urban Population: 31.16% (~377 million).
  • Projection (by 2036): ~40% (~600 million).
  • Metropolitan Cities (million+): 53.
• Main Drivers in India: Rural-urban migration (jobs, services), natural increase, rural area reclassification.

⭐ Urban Area (Census India): Statutory towns OR: min. 5,000 pop.; density ≥400/km²; & ≥75% male main non-agri. workers.

Health's Urban Maze - Double-Edged Sword

Urbanization: a double-edged sword impacting community health significantly.

Positive Impacts ("Promise"):

• Improved access: healthcare facilities, specialists, education.
• Better economic opportunities: potential for ↑ income, nutrition.
• Enhanced infrastructure: potentially better water, sanitation (variable).
• Increased health awareness & health-seeking behaviors.

Negative Impacts ("Peril"):

• Overcrowding & slums: rapid spread of communicable diseases (TB, cholera).
• Environmental pollution: air, water, noise → respiratory illnesses, cancers, NCDs.
• Lifestyle changes: sedentary habits, unhealthy diets → ↑ obesity, diabetes, hypertension.
• Mental health issues: stress, social isolation, substance abuse.
• Increased risk: accidents, injuries, violence.
• Strain on resources: water, sanitation, housing shortages.

⭐ Urban areas often face a "double burden" of disease: persisting communicable diseases and rising non-communicable diseases (NCDs).

Urban Hotspots & Risks - Vulnerability Zones

• Urban Hotspots (Vulnerability Zones): Concentrated health problem areas.
  • Slums & informal settlements: High density, poor housing & basic services.
  • Peri-urban areas: Unplanned growth, strained infrastructure, poor health access.
  • Industrial zones & areas near waste dumps: Pollutant & occupational hazard exposure.
• Key Risks in these Zones:
  • Overcrowding: ↑ TB, ARIs, skin infections.
  • Poor WASH: ↑ diarrheal diseases, cholera, typhoid.
  • Pollution (air, water, soil): ↑ respiratory illness, NCDs, poisoning.
  • Waste mismanagement: ↑ dengue, malaria, chikungunya.
  • Social determinants: Poverty, food insecurity, violence, mental stress.
• Highly Vulnerable Groups:
  • Urban poor, children <5, elderly, pregnant women, migrants, disabled.

  ⭐ Slums often exhibit a "triple burden" of disease: communicable diseases, non-communicable diseases (NCDs), and injuries/violence.

Fixing City Health - Urban Renewal Rx

Multi-pronged strategy vital for urban health revitalization:

• National Urban Health Mission (NUHM):
  • Focus: Urban poor, slum dwellers.
  • Delivery: Strengthens UPHCs & UCHCs.
  • Workforce: Urban ASHA (USHA). ⭐> NUHM targets cities/towns with population >50,000.
• Smart Cities Mission: Tech & smart infra for health solutions.
• AMRUT (Atal Mission for Rejuvenation and Urban Transformation): Water supply, sewerage.
• Swachh Bharat Mission (Urban) (SBM-U): Sanitation, hygiene, waste management.
• Core Pillars:
  • Inter-sectoral coordination (WCD, housing).
  • Community participation & empowerment.
  • Strong health governance, finance, MIS.
  • Regulation of private sector.

High‑Yield Points - ⚡ Biggest Takeaways

• Urban area criteria (India): Pop. >5000, density >400/km², >75% male non-agricultural work.
• Rapid urbanization in India presents unique health challenges.
• Double burden of disease (communicable & NCDs) is prominent in urban settings.
• Slums: High disease risk due to overcrowding, poor sanitation, and limited service access.
• NUHM (National Urban Health Mission) focuses on health of the urban poor.
• Major urban health issues: pollution, mental stress, accidents, and inequities.