As of May 2, 2009, CNN has reported there are 160 confirmed cases of swine flu across the United States of America and about 108 cases throughout the rest of the world. Although the swine flu (H1N1) strain's discovery in the 1930s has shown not so much an aggressive spread of the disease through the years worldwide, a flaccid approach to the prevention and eradication of any communicable pathogen could result into a catastrophe worldwide, as transmission methods are numerous and casual like mere sneezing, coughing, and usual human activities, like handshakes, kissing and talking with an infected or healthy pathogen carrier.

Preventive measures include keeping one's self healthy by having a well-balanced diet, taking in ample or optimal amounts of water (8 glasses of water for normal individuals) to keep one normally hydrated, getting enough quality sleep and rest (normally 8 hours of sleep) with some stress relieving naps, taking food supplements like vitamins and sources of good bacteria like lacto-bacilli, and keeping fit through exercise to boost one's stamina and daily life at all times, e.g., covering one's mouth when sneezing or coughing with a tissue paper and throwing the same in proper garbage disposal, and limiting, or being prudent in interactions and contacts during epidemics like this would surely help in preventing the contraction and spread of any disease.
In some countries, thermal scans in some arrival areas of airports have been employed and could help. Seeming simple little preventive measures like the use of thermal scans can go a long way, as early detection is the key towards more effective preventive measures to eradicate communicable diseases such as the swine flu.

Also communicably pathogenic, like the Severe Acute Respiratory Syndrome (SARS) virus, current and new viruses have mutated to become more fierce, possibly as adaptations to unsanitary methods of maintaining and propagating livestock resulting into stronger or more resistant strains of disease-causing pathogens that could thrive in harsher and filthier conditions, and cannot be eradicated anymore by mere human self-limiting capabilities and the usual medical treatments.

Indeed, here we see in both issues, that of global warming and the spread of air borne disease-causing pathogens, that prevention is really worth more than a pound of cure, before we fall into the point of no return that would result into our own Armageddon.

References

Black, Richard. Global Warming risk 'much higher'. BBC NEWS. 23 May 2006.