Antibiotics are a type of antimicrobial used in the treatment and prevention of bacterial infection. They may either kill or inhibit the growth of bacteria. Some antibiotics are also effective against fungi and protozoans, and are toxic to humans and animals. Antibiotics are not effective against viruses such as the common cold or influenza, and may be harmful when taken inappropriately.
Kàngshēngsù shì yīzhǒng fángzhì xìjūn gǎnrǎn de kàngjūnyào, kě shāsǐ huò yìzhì xìjūn shēngzhǎng. Yīxiē kàngshēngsù yě kě dǐkàng zhēnjūn hé yuánshēngwù, bìng duì rénlèi hé dòngwù yǒudú. Kàngshēngsù duì bìngdú rú pǔtōng gǎnmào huò liúxíngxìng gǎnmào wúxiào, shǐyòng bùdāng huì yǒuhài.