'Influenza' A (H1N1) virus is a subtype of influenza A virus and was the most common cause of human influenza (flu) in 2009. Some strains of H1N1 are endemic in humans and cause a small fraction of all influenza-like illness and a small fraction of all seasonal influenza. H1N1 (pronounced "HEE-NEE" by healthcare professionals) strains caused a small percentage of all human flu infections in 2004–2005. Other strains of H1N1 are endemic in pigs (swine influenza) and in birds (avian influenza).

In June 2009, the World Health Organization declared the new strain of swine-origin H1N1 as a pandemic. This strain is often called swine flu by the public media. This novel virus spread worldwide and had caused about 17,000 deaths by the start of 2010. On August 10, 2010, the World Health Organization declared the H1N1 influenza pandemic over, saying worldwide flu activity had returned to typical seasonal patterns.

As of 26 April 2011, an H1N1 pandemic preparedness alert has been issued by the World Health Organisation (WHO) for the Americas. The affected areas have included the Chihuahua region of Mexico where its severity and work load have been high. It is reported by the aforementioned Recombinomics source that the current vaccine (California/7/2009) for H1N1 influenza might be losing its effectiveness in 2011. This point is all the more significant since it is the current virus target for the northern hemisphere's flu vaccine, and is the intended choice for the southern hemisphere.

Los Aldeanos began as one of many underground Rap Cubano groups based in Havana, Cuba. Dubbed as "underground rappers", Los Aldeanos became a group in 2003, composed of El Aldeano and El B, both of whom are MC's. Los Aldeanos describe themselves as not being the pioneer of Rap Cubano, but credit themselves with producing "real" Rap Cubano, giving to the followers of "real" Rap Cubano and "real" Hip Hop lyrics that not only instill a sense of understanding of the social, political, and economical problems that aggravate Cuban society today, but also with a sense of urgency. The lyrics of Los Aldeanos are largely anti-status quo and as a result express sentiments that are critical of the government of Cuba. Such an example can be found in their song "Libertad de Expresión".

With such claims to authenticity and explicit discontent with the status quo, Los Aldeanos are just one among many underground rap bands that oppose the rising popularity of Reggaeton in Cuba. Groups like Los Aldeanos have come to openly disagree with and condemn Reggaeton, calling it unconscious and negative music that detracts Cuban society from the ailments that continue to afflict society and instead focuses attention on the pleasurable acts of self-indulgence and dance.