**Core Concept:** The Alma-Ata declaration is a significant document in the field of public health, particularly regarding the concept of primary health care (PHC). PHC emphasizes the provision of comprehensive healthcare services at the level of the community, focusing on preventive and promotive care, with the aim of achieving equitable distribution of healthcare resources and meeting the health needs of all individuals and populations.

**Why the Correct Answer is Right:** The Alma-Ata declaration on primary health care took place in the year 1978. It was a joint declaration by the World Health Organization (WHO) and the International Conference on Primary Health Care, held in Alma-Ata, Kazakhstan. This declaration marked a turning point in the global health agenda, promoting the implementation of PHC in countries worldwide.

**Why Each Wrong Option is Incorrect:**

A. This option is incorrect because the Alma-Ata declaration on primary health care occurred in 1978, not in 1968.

B. Though the WHO was founded in 1948, the Alma-Ata declaration was a separate event in 1978.

C. This option is wrong because the International Conference on Primary Health Care took place in Alma-Ata, Kazakhstan in 1978, not in 1967.

D. Although the concept of PHC has evolved since 1998, the Alma-Ata declaration itself occurred in 1978.

**Clinical Pearl:** The Alma-Ata declaration emphasized the importance of PHC in achieving global health goals and continues to influence healthcare policies and strategies. By understanding the correct year of this historical event, students can appreciate the significance of PHC and its impact on global healthcare systems.