By now, most people are aware that if they “like” a certain page on Facebook, it gives the social media giant information about them.
“Like” a page about a particular disease, for instance, and marketers may begin to target you with related products and services.
Facebook may be collecting sensitive health data in far more insidious ways as well, however, including tracking you when you’re on hospital websites and even when you’re in a personal, password-protected health information portal like MyChart.
It does this via pixels, which may be installed without your knowledge on websites you visit. They can collect information about you as you browse the web, even if you don’t have a Facebook account.
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