Morocco tops global immunity index as lifestyle and climate factors weigh on health

Morocco ranked first in a global index that links lifestyle and climate to immune health, beating 29 other countries with a score of 63.4 out of 80.

The 2026 World Immunity Index was published by Nature’s Best, a UK-based supplements company.

Researchers looked at public health data, weather records and Google searches to see how daily life and the environment may affect how well the immune system works.

Morocco’s strong result was tied to low rainfall, fewer online searches for mold and damp, and lower smoking rates compared with many countries in the study.

The report says these factors can reduce stress on the body and may help support stronger immunity.

India ranked second with a score of 54.2. South Africa came third at 53.7.

The United States and the United Kingdom were among the lowest performers. They scored 30.4 and 28.5, respectively. Higher obesity and smoking rates were key reasons behind their lower rankings.

Researchers based the index on eight indicators: median age, obesity levels, alcohol-related hospital admissions, smoking prevalence, annual temperature, pollution, average rainfall and Google searches for “mould” and “damp.” Scores were standardized to allow comparisons across countries.

The index does not test people’s immune systems directly. Instead, it looks at factors that research has linked to immune health over time.

Charlotte East, a nutrition expert at Nature’s Best, said the findings show that small, everyday habits matter.

She said sleep, regular exercise and a balanced diet all play a role in keeping the immune system working well.

The report also points to nutrients such as vitamin D, vitamin C and zinc as important for immune support. Still, it points out that supplements should not replace healthy food.

Stress, poor diet and smoking can weaken the body’s defenses. Cleaner air, moderate weather and healthier lifestyles can help.