EPIDEMIOLOGY Routes of transmission An airborne pathogen Person to person transmission mainly by the droplet spray Rarely by direct transmission from the fomites contaminated by the saliva 16 重庆医科大学儿童医院传染病教研室
16 EPIDEMIOLOGY ◼ Routes of transmission ⚫ An airborne pathogen ⚫ Person to person transmission mainly by the droplet spray ⚫ Rarely by direct transmission from the fomites contaminated by the saliva
EPIDEMIOLOGY Population susceptibility 0 Be susceptible to all the people without explosure to virus or vaccine The age of peak incidence:5-9 years old 85%of infections occurred in children below 15 years of age Incidence of baby under 6 months is lower 0 Both clinical and subclinical infections provide lifelong immunity,reinfection is extremely rare 17 重庆医科大学儿童医院传染病教研室
17 EPIDEMIOLOGY ◼ Population susceptibility ⚫ Be susceptible to all the people without explosure to virus or vaccine ⚫ The age of peak incidence: 5-9 years old ⚫ 85% of infections occurred in children below 15 years of age ⚫ Incidence of baby under 6 months is lower ⚫ Both clinical and subclinical infections provide lifelong immunity, reinfection is extremely rare
EPIDEMIOLOGY Epidemic Season o Winter and early spring o A cold-resistance pathogen 18 重庆医科大学儿童医院传染病教研室
18 EPIDEMIOLOGY ◼ Epidemic Season ⚫ Winter and early spring ⚫ A cold-resistance pathogen
EPIDEMIOLOGY percent% 25 20 15 10 0 1998199920002001 202203204205206207year 流行性腮腺炎占传染病总数的构成比 Constituent ratio of Mumps in hospitalized ID in CQCH:A 10-year-data 19 重庆医科大学儿童医院传染病教研室
19 percent % 0 5 10 15 20 25 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007year 流行性腮腺炎占传染病总数的构成比 Constituent ratio of Mumps in hospitalized ID in CQCH: A 10-year-data EPIDEMIOLOGY
EPIDEMIOLOGY percent% ◆0-28d 28d-ly 00 ★1y-3y -3y-7y 0010 *-7y-l4y 4-14y-18y 0 198192020120220032004200520062007year +18y- 流行性腮腺炎各年的年龄段构成比 Mumps in different ages in hospitalized ID in CQCH:A 10-year-data 20 重庆医科大学儿童医院传染病教研室
20 percent % 0 10 20 30 40 50 60 70 80 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007year 0-28d 28d-1y 1y-3y 3y-7y 7y-14y 14y-18y 18y- 流行性腮腺炎各年的年龄段构成比 Mumps in different ages in hospitalized ID in CQCH: A 10-year-data EPIDEMIOLOGY