What is the estimated additional investment needed each year to achieve targets for PHC?

The correct answer focuses on the estimated additional investment required to meet targets for Primary Health Care (PHC). Recent estimates by organizations such as the World Health Organization (WHO) suggest that achieving universal health coverage and other critical health targets necessitates a significant financial commitment.

The range of $200-328 billion reflects a realistic assessment of the funding gaps identified globally, taking into account factors like health infrastructure, workforce training, medical supplies, and access disparities across different regions. This figure underscores the pressing need for resources to strengthen primary health systems and ensure equitable access to health services, which is crucial for improving health outcomes and closing health equity gaps.

In comparison, the other options provide lower estimates that may not fully encapsulate the scale of investment required to tackle the comprehensive needs of PHC systems worldwide. Such necessary investments encompass not only immediate pandemic responses but also long-term health improvements and sustainability.