Does Optimism Boost the Immune System?

It is interesting to read a media release titled "Optimism Boosts the Immune System". The study provides some insights to this long debated topic.

Optimism in my life has some merit however in my profession I have to look at the worst scenarios sometimes which may look or sound pessimistic. Any design requires a holistic view of the topic both from optimistic and so called pessimistic aspects.

It is possible to come across paradoxical views on the optimistic behaviour such as to smile when it hurts most.Is this possible and realistic? Having said that, from hindsight we see blessings in disguise for the things seemed horrible to us when we were experiencing them.

Many comments were made throughout the history on optimistic and pessimistic approach. We all may have heard Churchill's famous assertion "A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.". Is it really so? As I asked in my another post "Do optimists see the opportunity in every difficulty?" Whose choice may it be?

Regards,
Mehmet Yildiz