Infects

When a new flu infects one human being, all are at risk.

Fear infects and corrupts everything it touches.

This fungus infects trees.

The variety that has proven deadly to infected humans, H5N1 virus, primarily infects poultry, but public-health authorities have long warned that a further mutation or alteration of the structure of the virus could produce a strain that could spread easily from human to human, and thus pose the potential threat of a worldwide pandemic.

One of the most popular and successful ways hackers infect your computer is through a technique called phishing. Phishing occurs when someone opens an email attachment that looks real. But the attachment is actually a virus that immediately infects the user’s computer. If someone sends you a file or a website you did not ask for, it is best to not click on it.

HIV infects and destroys the immune system’s CD-4 T-cells, so the body gradually loses its ability to fight off infections, eventually with lethal consequences in untreated individuals.

One scabbed sheep infects a whole flock.

One sheep with mange infects the entire flock.