[lemma=v | □=□]
[lemma=v | lemma=□]
If all pathogens used only the H antigen to infect cells , then there would be a selective pressure for everyone in the population to have only A or B antigens , but since there are pathogens that use H , A or B for infection , the population can survive by having some individuals with no H , some with no A and some with no B antigens . If approved by the Board of Directors , such amendment shall go into effect after it has been approved at two regular business meetings of the Club . Congress will also consider whether the predominance of loans in student aid packages has adverse consequences for low-income students who are often not comfortable incurring large levels of debt , and whether the process of applying for student aid is too complicated and likely to discourage needy students from securing aid . Further controls will only add to the costs of attendance for our students , while doing little , if anything , to improve quality . In addition , a new , elevated steady-state level of extracellular DA was established after electrically stimulated DA release in the presence of amphetamine , norepinephrine , and exogenous DA .