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close this bookEpidemiological Fact Sheet on HIV/AIDS and Sexually Transmitted Infections: Yemen (UNAIDS, 2000, 12 p.)
View the document(introduction...)
View the documentCountry Information
View the documentEstimated number of people living with HIV/AIDS
View the documentAssessment of epidemiological situation - Yemen
View the documentHIV sentinel surveillance
View the documentMaps of HIV sentinel sites
View the documentReported AIDS cases
View the documentCurable Sexually Transmitted Infections (STIs)
View the documentHealth service indicators
View the documentKnowledge and behaviour
View the documentSources
View the documentAnnex: HIV Surveillance data by site

Reported AIDS cases

AIDS cases by year of reporting

1979

1980

1981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

Total

Unkn

0

0

0

0

0

0

0

0

0

0

0

1

0

3

4

3

11

60

40

34


156


Date of last report: 25-02-1999

Following WHO and UNAIDS recommendations, AIDS case reporting is carried out in most countries. Data from individual AIDS cases is aggregated at the national level and sent to WHO. However, case reports come from surveillance systems of varying quality. Reporting rates vary substantially from country to country and low reporting rates are common in developing countries due to weaknesses in the health care and epidemiological systems. In addition, countries use different AIDS case definitions. A main disadvantage of AIDS case reporting is that it only provides information on transmission patterns and levels of infection approximately 5-10 years in the past, limiting its usefulness for monitoring recent HIV infections.

Despite these caveats, AIDS case reporting remains an important advocacy tool and is useful in estimating the burden of HIV-related morbidity as well as for short-term planning of health care services. AIDS case reports also provide information on the demographic and geographic characteristics of the affected population and on the relative importance of the various exposure risks. In some situations, AIDS reports can be used to estimate earlier HIV infection patterns using back-calculation. AIDS case reports and AIDS deaths have been dramatically reduced in industrialized countries with the introduction of HAART (Highly Active Anti-Retroviral Therapy).

AIDS cases by mode of transmission

Hetero: Heterosexual contacts.

Homo/Bi: Homosexual contacts between men.

IDU: Injecting drug use. This transmission category also includes cases in which other high-risk behaviours were reported, in addition to injection of drugs.

Blood: Blood and blood products.

Perinatal: Vertical transmission during pregnancy, birth or breastfeeding.

NS: Not specified/unknown.

Sex

Trans. Group

<96

1996

1997

1998 1999

Unkn

Total

%

All

Total

14

35

23

16


88

100.0


Hetero

8

34

15

11


68

77.3


Homo/Bi

2

0

8

4


14

15.9


IDU

0

0

0

0


0

0.0


Blood

4

1

0

1


6

6.8


Perinatal

0

0

0

0


0

0.0


Other Known









Unknown








Male

Total









Hetero









Homo/Bi









IDU









Blood









Perinatal









Other Known









Unknown








Female

Total









Hetero









IDU









Blood









Perinatal









Other Known









Unknown








NS

Total









Hetero









IDU









Blood









Perinatal









Other Known









Unknown








Aids cases by age and sex

Sex

Age

<96

1996

1997

1998

1999

Unkn.

Total

%

All

All

22



17






0-14




1






15-19




0






20-29




7






30-49




8






50+




1






NS










All

20



12





Male

0-14




1






15-19




0






20-29




4






30-49




6






50+




1






NS










All

2



5





Female

0-14




0






15-19




0






20-29




3






30-49




2






50+




0






NS









NS

All










0-14










15-19










20-29










30-49










50+










NS