الرسم البياني يوضح عدد الوفيات بالحصبة ونسبة التغطية بالتطعيم خلال عدة سنوات. ما الاستنتاج الصحيح؟

The graph shows measles deaths and vaccination coverage over several years. What is the correct conclusion?

1. Vaccination is unrelated to deaths
2. More coverage, fewer deaths
3. More coverage, more deaths
4. Deaths stayed constant

Answer: B) More coverage, fewer deaths. Coverage rises as the bars fall, an inverse relationship; the graph supports a vaccine effect, though correlation alone does not prove causation.