Fig. 5From: A case-crossover analysis of the impact of weather on primary cases of Middle East respiratory syndromeDaily humidity variables and risk of primary MERS by province in Saudi Arabia. Odds ratio (solid line) and 95% confidence limits (dashed lines) are plotted on the Y-axis, while time lags preceding case occurrence are plotted on the x-axis. The odds of primary MERS is increased 8 days after relatively low humidity (a), while the odds of primary MERS are decreased with higher humidity at 8–10 day lags (b-d). Asterisks indicate statistically significant odds ratios on corresponding daysBack to article page