I think that all countries are affected to a greater or lesser extent by climate change. However, some regions are more vulnerable than others. For example, the inhabitants of small island developing states and other coastal regions, megalopolis and mountainous and polar regions are especially vulnerable to their effects (extreme heat, natural disasters and alterations in climate and rainfall, wider distribution of diseases and infections, etc). 

Children, particularly those in poor countries, are one of those populations most vulnerable to the resulting health risks and will be exposed to the health consequences for longer. It's also anticipated that the health effects will be more severe in the elderly and people with various ailments or pre-existing ailments. 

Areas with poor health infrastructure, most in developing countries, will have the most difficulty in preparing and responding if they don't receive assistance.

Apart from this, many more controls of atmospheric pollutants and greenhouse gases are required and, in addition, more infrastructures are needed that try to curb the effects of climate change (such as, for example, artificial reef barriers or concrete barriers to mitigate the devastating effects of an increase in seawater level). These actions are more present in developed countries, but are almost non-existent in the so-called third world.

I think literate population across the world understand and feel the problem of climate change and its effects. However, illiterate population particularly of the third world countries are unaware of this threat and effects. 

Places (regions) where a large proportion of the residents depends for their household income on farming and/or gathering will be perceive climate change directly and immediately.

Places where the regional economy depends for less than then 5% on farming/gathering, as is common in the high income country brackets/OECD countries, the majority of households will not feel the change in their cash income (e.g. attached). 

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