The presence of contaminating sequences is bigger in minimal-biomass samples (such as from blood or the lung) than in higher-biomass samples (such as from faeces), suggesting that there is a important tipping position where contaminating DNA becomes dominant in sequence libraries. Hypothesis testing referring to DNA generate and alpha diversity https://www.facebook.com/NewTechFind/posts/pfbid0QbG6o3mUfwwttnHDoZnEG7G7VLTay3kAZSputhcKcaAybGeCC2QjhsSktc7yRfG8l