Data from large meta-analyses show that measles vaccination is highly effective and safe, giving a 95% reduction in the risk of measles.<br><br><a href="https://ourworldindata.org/measles-vaccine-effectiveness-safety" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/1d042616-0031-4929-ef74-a0d7a3176000/w=1350"/></a>

Foreign aid measurement is complicated — what exactly counts as Official Development Assistance, what doesn’t, and how much is actually spent abroad?<br><br><a href="https://ourworldindata.org/what-is-foreign-aid" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/45c115b3-453b-4d01-6ded-31b0e8570700/w=1350"/></a>

A breakdown of the sources of many air pollutants that damage our health and ecosystems.<br><br><a href="https://ourworldindata.org/air-pollution-sources" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/5a98a347-7411-40c8-4c1b-30a542d22f00/w=1350"/></a>

In many countries, a significant share of aid is spent domestically on hosting refugees, offering student scholarships, and administrative costs.<br><br><a href="https://ourworldindata.org/foreign-aid-domestic-overseas" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/78a7ce1c-2086-4716-c5dc-30f130bbee00/w=1350"/></a>

Most countries spend less than 1% of their national income on foreign aid; even small increases could make a big difference.<br><br><a href="https://ourworldindata.org/foreign-aid-donations-increase" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/486658e7-cc1e-4bed-f5a7-4c66b7ced500/w=1350"/></a>

The world is warming despite natural fluctuations from the El Niño cycle.<br><br><a href="https://ourworldindata.org/global-temperatures-el-nino-la-nina" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/40c0d7fb-f503-45b1-8eda-8cc001f4dd00/w=1350"/></a>

The baby boom reshaped family life and drove population growth in many countries. In this article, we explore the key patterns in seven charts.<br><br><a href="https://ourworldindata.org/baby-boom-seven-charts" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/8ef118fd-a238-4212-76af-2674b5b4d300/w=1350"/></a>

The fertility rate is commonly confused with the eventual number of births per woman. This can result in misinterpreting the impact of policies and trends over time.<br><br><a href="https://ourworldindata.org/total-fertility-rate-births-per-woman" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/07feefbb-15b0-4bbe-6a26-894e38507400/w=1350"/></a>

Data on fertility rates, ages of mothers and fathers at childbirth, twin births, reproductive technologies, contraception, and more.<br><br><a href="https://ourworldindata.org/fertility-rate" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/22159485-fcb9-4811-8ca9-93644ffade00/w=1350"/></a>

Air pollution tends to get worse before it gets better, but how can we accelerate this transition?<br><br><a href="https://ourworldindata.org/cleanest-air-lessons" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/2634177d-6b60-4df5-3152-c38263399f00/w=1350"/></a>

An honorary doctorate from KU Leuven & UCLouvain and a “Dove of Peace” in Germany.<br><br><a href="https://ourworldindata.org/max-roser-received-two-prestigious-honors" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/679eea1d-ea22-4824-cccd-6b2044447a00/w=1350"/></a>

Maternal mortality was much more common in the past. It is much lower today, but global inequalities are still large.<br><br><a href="https://ourworldindata.org/maternal-deaths-save-mothers" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/1a2ccaa1-7f25-4250-6151-acd5affb0400/w=1350"/></a>

Check out the new video from Oxford Social Sciences, where Max shares his journey with this project.<br><br><a href="https://ourworldindata.org/watch-max-roser-share-our-world-in-data-story" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/a44cfeae-4550-44ed-1444-3b04c04ad800/w=1350"/></a>

Estimates range from less than $1 trillion to $7 trillion. Where do these numbers come from?<br><br><a href="https://ourworldindata.org/how-much-subsidies-fossil-fuels" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/58092c37-e5b8-42af-8d79-60234c162400/w=1350"/></a>

We are very excited to share that Claire Melamed and Michael Blastland have joined our Board of Trustees.<br><br><a href="https://ourworldindata.org/new-trustees-claire-melamed-michael-blastland" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/a012091e-33f8-4e5e-c5c7-6993c6f70200/w=1350"/></a>

The path to recent advanced AI systems has been more about building larger systems than making scientific breakthroughs.<br><br><a href="https://ourworldindata.org/scaling-up-ai" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/ded84c3a-78c9-40c4-ace2-6bf8dd7c4f00/w=1350"/></a>

Migrants send or bring back over three times the amount of global foreign aid. Cutting transaction fees could make this support even more effective in reducing poverty.<br><br><a href="https://ourworldindata.org/great-global-redistributor-money-sent-brought-back-migrants-remittances" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/b514dca3-733b-4e55-481d-66d83f6c8900/w=1350"/></a>

In the 1980s, economist Julian Simon won his bet with biologist Paul Ehrlich on mineral prices. But what does the long-term data tell us about supply and demand for resources?<br><br><a href="https://ourworldindata.org/simon-ehrlich-bet" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/0ca9751d-f29d-46bb-8e3f-31eaf6087d00/w=1350"/></a>

Antibiotics revolutionized medicine, but their effectiveness is threatened by resistance. This new page presents global data and research on antibiotics and antibiotic resistance.<br><br><a href="https://ourworldindata.org/antibiotics" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/0983df2b-3d7f-416f-71be-f4ad93a8a100/w=1350"/></a>

Many antibiotics were developed during the “Golden Age of Antibiotics”. How did it happen, why has antibiotic development slowed down since then, and what can we do to reignite it?<br><br><a href="https://ourworldindata.org/golden-age-antibiotics" target="_blank"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/7b3bf2c1-8af6-4e65-2e92-d5e4d781d800/w=1350"/></a>