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Mother-to-child transmission of HIV-1 is responsible for the infection of hundreds of thousands of infants every year. The use of prophylactic antiretroviral treatments has brought about a dramatic decrease in the risk of transmission. Nevertheless, vertical transmission can still occur. In some cases, the presence of drug-resistant HIV-1 strains in the mother has been responsible for the failure...
Statistical and biological data from the Portuguese trawl and gillnet fisheries for cod (Gadus morhua) were studied. Catch rates and mean lengths in the catches were standardized in order to look at the fluctuation of these indices throughout the years, months and Divisions separately, by cancelling the effect of the two other simultaneous sources of variation.
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