Vincent and Dick continue virology 101 with a discussion of virus entry into cells, then answer reader email on colony collapse disorder and viruses that confer a benefit to their host. Links for this episode: Illustrations of virus entry into cellsNice reference for biological items (thanks Jim!)Colony collapse disorder: PBS program, descriptive study, metagenomic study, genetic analysis (thanks Swiss compass!)Potato virus Y and Alzheimer's disease (thanks Jennifer!)A virus in a fungus in a plant (thanks Jennifer!) Weekly Science Picks Vincent PLoS Pearls Dick West Nile virus website at CDC