However, some virus samples are still available in Russian and American laboratories.

However, at the end of the story, he apparently succumbs to the virus himself before he can escape, his physiology being close enough to that of the Daleks for the virus to affect him.

However, the country lagged behind on the goals of eliminating extreme poverty and hunger, reducing child and maternal mortality, and combating diseases such as human immunodeficiency virus / acquired immune deficiency syndrome ( HIV / AIDS ) and malaria.

However, developments in Adeno-associated virus recombination techniques, and Zinc finger nucleases, have enabled the creation of a new generation of isogenic human disease models.

However, if the immune system or " good " microbiota are damaged in any way ( such as by chemotherapy, human immunodeficiency virus ( HIV ), or antibiotics being taken to kill other pathogens ), pathogenic bacteria that were being held at bay can proliferate and cause harm to the host.

However, retroviruses function differently-their RNA is reverse-transcribed into DNA, which is integrated into the host cell's genome ( when it becomes a provirus ), and then undergoes the usual transcription and translational processes to express the genes carried by the virus.

However there are some problems associated with these methods involving efficiency ( liposomes insufficient protein ) and delivery ( virus provokes an immune response ).

However, it may become permeable to these types of cells because of an infection or a virus.

However, most scientific articles continued to refer to Ebola virus or used the terms Ebola virus and Zaire ebolavirus in parallel.

However, because many keylogging programs are legitimate piece of software under some circumstances, anti spyware often neglects to label keylogging programs as spyware or a virus.

However, the virus was so efficient at attenuating fungal growth that it prevented spreading of the virus from an infected fungus growing on one tree to that growing on another tree.

However, no alternative therapy has been shown to improve outcomes in, and no evidence exists that alternative therapies have any effect on the virus at all.

However, by January 15, of the following year Sauvé resigned as an MP, and thus as speaker, and two days later she was hospitalised ; rumours circulated that it was due to cancer, but the official story was that the she had contracted a respiratory virus, which was further complicated by an allergy to antibiotics.

However, several febrile diseases match many of the symptoms of the disease and only recently has distinguishing between canine hepatitis, herpes virus, parainfluenza and leptospirosis been possible.

However, the antiviral drug valacyclovir has recently been shown to lower or eliminate the presence of the Epstein – Barr virus in subjects afflicted with acute mononucleosis, leading to a significant decrease in the severity of symptoms.

However, in susceptible hosts under the appropriate environmental stressors, the virus can reactivate and cause vague physical symptoms ( or may be subclinical ), and during this phase the virus can spread to others.

However, in other retroviruses, the host cell remains intact as the virus buds out of the cell.

However, in May 2009, the Korea Food Research Institute, Korea ’ s state food research organization, said they had conducted a larger study on 200 chickens, which supported the theory that it boosts chickens ' immunity to the virus.

However, new studies using sensitive DNA techniques have shown that through immunological response the virus can either be cleared or suppressed to levels below what polymerase chain reaction ( PCR ) tests can measure.

However, those who could not withstand the virus would be killed once infected.

However, no comprehensive environmental protection program has emerged, and decisions on environmental policy have been made on an ad hoc basis.

However, the marine and freshwater environments of fishes mitigated environmental effects of the extinction event.

However, the differences between the various groups that make up the modern environmental movement tend to outweigh such similarities, and they rarely co-operate directly except on a few major global questions.

However, the term could also be applied to environmental scientists.

However, by the mid-19th century, environmental determinism was under attack for lacking methodological rigour associated with modern science, and later as serving to justify racism and imperialism.

However, recent research published in Environmental Science & Technology, a publication of the American Chemical Society, suggests that many cases of feline hyperthyroidism are associated with exposure to environmental contaminants called polybrominated diphenyl ethers ( PBDEs ), which are present in flame retardants in many household products, in particular, furniture and some electronic products.

However reservoirs have significant environmental impact, as does alteration of naturally occurring stream flow.

However, environmental and safety issues exist with the choice of vegans.

However, the conclusion was ambiguous as the overall content was above that expected of a male, and variations across the body may have been due to environmental factors.

However, natural selection is " blind " in the sense that changes in phenotype ( physical and behavioral characteristics ) can give a reproductive advantage regardless of whether or not the trait is heritable ( non heritable traits can be the result of environmental factors or the life experience of the organism ).

However, the need to respond to environmental concerns over the country's globally recognized ecological heritage, may increasingly need to be factored into capitalization of mining operations.

However, pre-war claims of wide scale, long-lasting, and significant global environmental impacts were not borne out and found to be significantly exaggerated by the media and speculators, with climate models at the time of the fires predicting only more localized effects such as a daytime temperature drop of ~ 10 ° C within ~ 200 km of the source.

However, an underexplored approach is that of Helmuth Plessner, whose idea of a material a priori based in our biology and environmental interactions is only now being recognized as relevant to a hermeneutics of nature, for example, in the works of Petran Kokelkoren.

However, due to exposure to environmental disease ( parvovirus ), parasites and competition, ( with coyotes as well as intraspecific aggression ), the red wolf was unable to successfully establish a wild population in the park.

However, twin and adoption studies suggest that genetic factors interact with environmental factors for stuttering to occur, and many stutterers have no family history of the disorder.

However, the point at which a solution can become saturated can change significantly with different environmental factors, such as temperature, pressure, and contamination.

However, this view depends on whether one determines that it is the development ( the plant ) which needs to be sustainable, or whether it is the human-nature ecology ( the environmental conditions ) in which the plant exists which should be sustainable.

However, as environmental technologies were to make up a potential market, some countries made large investments in renewable energies, energy conservation and sustainable transport.

However, when other environmental influences like poverty, low education of the parent, and violence in the home are controlled ; children of cohabiting couples are developmentally similar to their peers from a two parent family.

However, the walls are naturally porous and only act as stiff shells that protect bacteria from severe environmental impacts.

However, Argentina has prohibited such helicopter tours because of the environmental impact on the flora and fauna of the falls.

However, individual scientists may disagree as to the role that genetic and environmental factors play.

However, the incidental environmental damage is severe, since many plant species are wiped out in the process.

However, it is believed to be due to a combination of biological, psychological and / or environmental abnormalities.