Health Rewind: How Dangerous Is Ricin? 

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Toxic Letter Sent to Obama: How Dangerous Is It?

A letter intended for President Obama was intercepted and tested positive for a toxin called ricin. But what exactly is ricin and just how harmful is it? In a new article, Time.com gives us the 411 on the chemical ricin, how it’s made, how the body ingests it and how lethal it can be to our health. —Kellee Terrell

 

(Photo: AP Photo/Charles Dharapak)