"The primary hashtag that we are using is #HealthForAll but look out for posts using #WorldHealthDay as well," informs the WHO to campaigners of the observation.

The key message of the Director-General of WHO on World Health Day: "No one should have to choose between death and financial hardship. No one should have to choose between buying medicine and buying food." Dr Tedros Adhanom Ghebreyesus has the vision of "Together for a healthier world".

This year, it is the 70th anniversary WHO. It has urged the world leaders to live up to the pledges they made when they agreed the Sustainable Development Goals in 2015, and commit to concrete steps to advance the health of all people. "This means ensuring that everyone, everywhere can access essential quality health services without facing financial hardship," states the WHO.

The WHO has the focus on "universal health coverage" (UHC) and has advised," Countries that invest in UHC make a sound investment in their human capital. In recent decades, UHC has emerged as a key strategy to make progress towards other health-related and broader development goals. Access to essential quality care and financial protection not only enhances people's health and life expectancy, it also protects countries from epidemics, reduces poverty and the risk of hunger, creates jobs, drives economic growth and enhances gender equality."

WHO is going to maintain a high-profile focus on UHC via a series of events through 2018, starting on World Health Day on 7 April with global and local conversations about ways to achieve 'Health for All'.