tarttuvuudesta
Tarttuvuudet, known in English as infectious diseases, are illnesses caused by pathogens such as bacteria, viruses, fungi, or parasites that can spread from one individual to another. The term encompasses both communicable and some non-communicable conditions that arise from pathogen exposure. Transmission routes include direct contact, airborne droplets, bodily fluids, vectors, and contaminated surfaces, and factors such as environmental conditions, host susceptibility, and pathogen virulence influence spread.
A key concept in understanding infectiousness is the basic reproduction number, R0, which represents the average
The incubation period, the interval between exposure and symptom onset, varies widely among pathogens and determines
Research into microbial genetics, host immunity, and socio‑economic determinants continues to inform the development of targeted