How antibiotic resistance genes move between bacterial species

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Drug-resistance genes can spread between different bacteria

Bacteria can pass genes for drug resistance to other bacteria, even to different species. This lets resistance spread much faster than it would through reproduction alone.

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Most cancer deaths happen after the cancer spreads

Cancer cells can leave the original tumor and grow in other parts of the body. This process is called metastasis. Most cancer deaths are caused by cancer after it has spread rather than by the original tumor alone.

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Hawaiʻi's Indigenous population fell sharply

Fewer Than 40,000

After Europeans and Americans arrived carrying diseases such as smallpox, measles, tuberculosis, and syphilis, the population fell from an estimated 300,000 to one million people to fewer than 40,000 by 1890.

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