The two materials can both harbor bacteria, but one is actually a bit safer for home kitchens.
Why you shouldn't buy a plastic cutting board - CNET
Wood Vs Plastic Cutting Boards - Which One is Better & Safer
Plastic Cutting Board Set of 3 Different Sizes
Wood vs Plastic Cutting Boards: Which You Should Buy for Your Kitchen
Wood Versus Plastic Cutting Boards
Wood Vs Plastic Cutting Boards - Which One is Better & Safer
Wood vs. Plastic Cutting Boards
What makes the best cutting boards: wood, plastic, or bamboo? - Sustainability Scout
Wood Cutting Board vs Plastic Cutting Board - Ruvati USA