What do you understand by nanotechnology and how is it helping in health sector? (Answer in 150 words)

Nanotechnology manipulates matter at approximately 1–100 nanometres, where materials display distinctive optical, electrical, chemical and biological properties.

• Targeted drug delivery directs medicines to diseased tissues, potentially reducing toxicity and dosage.
• Nanoparticles support imaging, biosensors and early detection of cancers, infections and cardiovascular conditions.
• Nanomaterials enable antimicrobial coatings, wound dressings, implants and tissue-engineering scaffolds.
• Rapid diagnostic kits use nanosensors to detect pathogens and biomarkers at low concentrations.
• Nanocarriers can improve delivery of vaccines, genes and poorly soluble medicines.

Risks include uncertain toxicity, bioaccumulation, environmental release, high costs, inadequate standards and unequal access. Long-term clinical evidence, regulatory oversight, lifecycle assessment and transparent labelling are therefore essential.

With responsible innovation, nanotechnology can make healthcare more precise, preventive, affordable and portable, particularly in diagnostics and drug delivery.

Keywords: nanoscale, targeted therapy, biosensors, nanocarriers, precision medicine, nanotoxicology.