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Understanding the mechanisms that control the accumulation of large silicic magma bodies in the upper crust is key to determining the potential of volcanoes to form caldera-forming eruptions. Located in one of the most populated regions on Earth, Camp Flegrei is an active and restless volcano that has produced two cataclysmic caldera-forming eruptions and numerous smaller eruptive events over the past 60,000 years. Here, we combine the results of an extensive petrological survey with a thermomechanical model to investigate how the magmatic system shifts from frequent, small eruptions to large caldera-forming events. Our data reveal that the most recent eruption of Monte Nuovo is characterized by highly differentiated magmas akin to those that fed the pre-caldera activity and the initial phases of the caldera-forming eruptions. We suggest that this eruption is an expression of a state shift in magma storage conditions, whereby substantial amounts of volatiles start to exsolve in the shallow reservoir. The presence of an exsolved gas phase has fundamental consequences for the physical properties of the reservoir and may indicate that a large magma body is currently accumulating underneath Campi Flegrei.

Background: This study assess knowledge, attitudes, and practices regarding Human Immunodeficiency Virus (HIV) testing and counseling services and the predictor characteristics of these outcomes among individuals who presented for the first time to Voluntary Counseling and Testing (VCT) public services., Methods: A sample of 244 subjects in the geographic area of Naples (Italy) received a self-administered anonymous questionnaire about socio-demographic characteristics, knowledge, attitudes relating to HIV infection, and practices relating to access to VCT service., Results: Only 25% correctly identified the main modes of transmission and the main preventative measures of HIV and this knowledge was significantly higher in who had had more than one sexual partner and have not always used a condom during the intercourse in the last year, in those who have received information about HIV/AIDS through physician, and in those who have received middle school or lower educational level. The perceived risk of contracting HIV/AIDS was significantly higher in respondents of lower age, in those who perceived a better personal health status, and in those unmarried. Only 20.9% reported that they had received the HIV test and males and those who visited a physician or participated in preventive activities about HIV/AIDS were significantly more likely to have had an HIV test., Conclusions: This study supports the need to disseminate information and interventions to this population.

Many different factors have influenced the recent expansion of private medicine. In this article, Suzanne Mollo examines them in detail and looks at the future prospects for both NHS and private health care.