Article in English: There are key differences between bacteria and viruses in size, origins, and effects on the body.  Viruses are the smallest and simplest life form; they are 10 to 100 times smaller than bacteria. Bacteria are single-celled organisms that can live either inside or outside other cells. They can survive without a cellular host. Viruses, on the other hand, are only intracellular organisms, meaning that they infiltrate the host cell and live inside the cell. Viruses change the host cell's genetic material from its normal function to producing the virus itself. Antibiotics cannot kill viruses, but can kill most bacteria, with the exception of bacteria that have become resistant to the antibiotic. Misuse and overuse of antibiotics have led to antibiotic resistance. Antibiotics are becoming less effective against potentially harmful bacteria.  Gram-negative bacteria are highly resistant to treatment with antibiotics, but can be killed by some. Viruses must have a living host to multiply, such as a plant or animal. Meanwhile, most bacteria can grow on non-living surfaces.  Bacteria have all the "machinery" (cell organelles) needed for their growth and multiplication and usually reproduce asexually. By contrast, viruses generally carry information - for example, DNA or RNA, packaged in a protein and/or membranous coat. They need the host cell's machinery to reproduce. The "legs" of a virus attach onto the surface of the cell and then the genetic material contained inside the virus is injected into the cell. Put differently, viruses are not really "living", but are essentially information (DNA or RNA) that float around until they encounter a sufficient host. Though it may seem hard to believe, many, many tiny organisms live within (but are distinct from) our bodies. In fact, in terms of pure number of cells, most people are roughly 90% microbial life and only 10% human cells. Many bacteria exist peacefully with our bodies; some even perform very important tasks, like making vitamins, breaking down waste, and making...

Summary in Vietnamese:
Nắm được sự khác biệt cơ bản. Nhận biết sự khác biệt về cơ chế sinh sản. Xác định liệu một sinh vật có lợi cho cơ thể hay không. Xác định liệu một sinh vật có đạt tiêu chí có sự sống hay không. Nhận biết những nguyên nhân gây bệnh thông thường do vi khuẩn và vi rút. Sử dụng bảng đơn giản dưới đây để biết cách phân biệt về cơ bản vi khuẩn và vi rút.