These vaccines may be produced by passaging, for example, adapting a virus into different host cell cultures, such as in animals, or at suboptimal temperatures, allowing selection of less virulent strains, or by mutagenesis or targeted deletions in genes required for virulence.

These genes undergo intergenic recombination, further contributing to their virulence.

These three models help to explain the life history strategies of parasites, including reproduction, migration within the host, virulence, etc.

These mobile genetic elements may range from 10-200 kb and encode genes which contribute to the virulence of the respective pathogen.

These are personality factors ; ;

These factors practically insure that no single financing formula is feasible ; ;

These factors can make the difference between waste and efficiency in any benefit program.

These are substantially the same factors considered by Non-Catholics in family planning.

These antigens should, under normal conditions, not be the target of the immune system, but, due to mainly genetic and environmental factors, the normal immunological tolerance for such an antigen has been lost in these patients.

These genetic factors are believed to, in part, explain the differing rates of alcohol dependence among racial groups.

These two factors limit many species of animals and plants to a relatively narrow region of Baltic Sea.

These factors include insulin-like growth factors I and II, transforming growth factor-beta, fibroblast growth factor, platelet-derived growth factor, and bone morphogenetic proteins.

These two factors combined with others have obscured the history of the Baltic languages, leading to a number of theories regarding their position in the Indo-European family.

These factors, combined with other possible secondary effects after prolonged use such as psychomotor, cognitive, or memory impairments, limit their long-term applicability.

These may be brought about, for example, by such factors as poor management, lack of consultation with employees, personality conflicts which can result in people delaying or refusing to communicate, the personal attitudes of individual employees which may be due to lack of motivation or dissatisfaction at work, brought about by insufficient training to enable them to carry out particular tasks, or just resistance to change due to entrenched attitudes and ideas.

These newer concerns are among the many factors causing researchers to investigate new methods of computing such as the quantum computer, as well as to expand the usage of parallelism and other methods that extend the usefulness of the classical von Neumann model.

These factors led to the shift of the store of value being the metal itself: at first silver, then both silver and gold, at one point there was bronze as well.

These are caused by many factors:

These different factors affect the diamond's hardness, smoothness, conductivity, optical properties and more.

These factors – combined with a war for players between the two leagues that raised salaries and ate into owners ' profits – ultimately led to the dissolution of the AAFC and the merger of three of its teams, including the Browns, into the NFL in 1949.

These styles are distinctive from one another due to factors such as available resources, climate, geography, history, cooking techniques and lifestyle.

These two factors may thus be seen as mitigating each other in many cases.

These factors caused the Latin hexameter to take on distinct Latin characteristics.

These include the number of times a civilization might re-appear on the same planet, the number of nearby stars that might be colonized and form sites of their own, and other factors.

These factors make it more difficult and dangerous to diagnose problems.

These factors highlighted the Government of Ecuador's unsustainable economic policy mix of large fiscal deficits and expansionary money policy and resulted in an 7. 3 % contraction of GDP, annual year-on-year inflation of 52. 2 %, and a 65 % devaluation of the national currency in 1999.

These are efficient at evaluating the effects and possible interactions of several factors ( independent variables ).

These factors include the learner's developmental status, the perceived prestige and competence of the model, the consequences received by the model, the relevance of the model's behaviors and consequences to the learner's goals, and the learner's self-efficacy.

These are only halfway measures, and the answer will come when some way is found to allow the technical man in industry to progress without limit in salary and prestige ''.

These secrete enzymes that allow the parasite to enter other cells.

These rules did allow the fighters an advantage not enjoyed by today's boxers: They permitted the fighter to drop to one knee to begin a 30-second count at any time.

These procedures are preferred by some breast cancer patients because they result in an abdominoplasty ( tummy tuck ), and allow the breast to be reconstructed with one's own tissues instead of a foreign implant.

These pores allow naturally occurring enteric bacteria, such as E. coli and Enterobacter, to enter the hemocoel, where they multiply and cause sepsis.

These methods allow us to understand how intelligent behavior is implemented in a physical system.

These effects have been used by Sepp Holzer for one to allow fruit trees to survive at otherwise inhospitable temperatures and altitudes.

These methods can be applied to proteins and other large biological molecules, and allow studies of the approach and interaction ( docking ) of potential drug molecules ( e. g. and ).

These conventions allow some operators in both languages to serve both as predicates ( answering a boolean-valued question ) and as returning a useful value for further computation, but in Scheme the value '() which is equivalent to NIL in Common Lisp evaluates to true in a boolean expression.

These " coupon settlements " ( which usually allow the plaintiffs to receive a small benefit such as a small check or a coupon for future services or products with the defendant company ) are a way for a defendant to forestall major liability by precluding a large number of people from litigating their claims separately, to recover reasonable compensation for the damages.

These feelings are apparently reciprocated, as Jet and Spike always allow her to return despite claiming they're pleased to see her leave.

These induced characteristics allow the cholera vibrios to survive in the " rice water " stools, an environment of limited oxygen and iron, of patients with a cholera infection.

These games, however, do not allow the participants to choose how much they drink, as this is dependent on the act of skill.

These database requirements translate to requirements for the respective DBMS, to allow conveniently building a proper database for the given application.

These nations ' fighters instead were optimized for speed and firepower to allow pilots to quickly engage, dispatch and disengage with opposing aircraft.

These shallow bodies of water allow limited transportation to points along the coast.

These technological advances and investment allow the primary sector to require less workforce and, this way, developed countries tend to have a smaller percentage of their workforce involved in primary activities, instead having a higher percentage involved in the secondary and tertiary sectors.

These exclusive rights allow owners of intellectual property to benefit from the property they have created, providing a financial incentive for the creation of an investment in intellectual property, and, in case of patents, pay associated research and development costs.

These mechanisms allow clients to retrieve the text portion of a message without retrieving attached files or to stream content as it is being fetched.

These formats are designed to allow for a full length play to be created improvisationally.

These clearances allow ATC to optimize the arrival of aircraft at major airports, which increases airport capacity, and uses less fuel providing monetary and environmental benefits to airlines and the public at large respectively.

** Inward-rectifier potassium channels: These channels allow potassium to flow into the cell in an inwardly rectifying manner, i. e., potassium flows effectively into, but not out of, the cell.

These complex architectures allow some group I and group II introns to be self-splicing, that is, the intron-containing RNA molecule can rearrange its own covalent structure so as to precisely remove the intron and link the exons together in the correct order.

These allow the image to be

These techniques allow organizations to understand their existing code assets ( using discovery tools ), provide new user and application interfaces to existing code, improve workflow, contain costs, minimize risk, and enjoy classic qualities of service ( near 100 % uptime, security, scalability, etc.