The blue-white gradient epidemic prevention poster

Quick answer：

The 'blue-white gradient epidemic prevention poster' typically refers to a visual communication tool used during health crises, such as the COVID-19 pandemic. These posters often feature a gradient of blue and white colors, symbolizing cleanliness and safety. They aim to convey messages about hygiene practices, vaccination awareness, and other preventive measures. The design might include text, symbols, and images that are easily understandable to a wide audience, especially in areas with low literacy rates.