It is difficult to kill viruses bccausc they

Viruses are uniquely difficult to eliminate because they lack a cellular structure, being described as acellular and microscopic entities [2]. Unlike bacteria, which have well-defined cell walls and metabolic machinery that can be targeted by antibiotics, viruses do not possess these cellular components [3]. They consist primarily of genetic material encased in a protein coat and do not exhibit molecular movement or independent metabolism outside of a host [4]. Because they are not true cells, they do not have the physiological targets (like cell walls or ribosomes) that many antimicrobial drugs act upon [3]. Furthermore, their status as obligate intracellular parasites means they hijack the host's own cellular resources to replicate, making it challenging to develop treatments that kill the virus without harming the host's own cells [4].

Sources

1. [2] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 2: The Invisible Living World: Beyond Our Naked Eye > Ever heard of ... > p. 17
2. [1] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 2: The Invisible Living World: Beyond Our Naked Eye > Snapshots > p. 24
3. [3] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 3: Health: The Ultimate Treasure > 3.5.1 Treatment of diseases > p. 39
4. [4] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > p. 79