Continuous surveillance of influenza was carried out in Pune between 1978 and 1990. Most of the cases were identified during investigation of 16 outbreaks of influenza in Pune over this period. The majority of cases were children. Ten of the outbreaks occurred during rainy seasons. A total of 290 isolates consisting of several antigenic variants of influenza type A (H3N2), type A (H1N1), and ty...

During the past century, 4 influenza pandemics occurred. After the emergence of a novel influenza virus of swine origin in 1976, national, state, and local US public health authorities began planning efforts to respond to future pandemics. Several events have since stimulated progress in public health emergency planning: the 1997 avian influenza A(H5N1) outbreak in Hong Kong, China; the 2001 an...

About 58,000 Indochina refugees worked in OASDHI-covered employment in the period 1975-76 and acquired at least 1 quarter of coverage (table 3). This figure represents about 43 percent of those to whom a social security number was issued and processed through the end of 1976. Fifty-three percent of the men workers issued numbers had acquired at Ieast 1 quarter of coverage, compared with 32 perc...

A class o f soluble three "spec ies" reaction-diffusion type systems is presented Exact solutions are obtained which show turbulent spatio-temporal evolution All homogeneous evolution tends asymptot ical ly toward an attractor which is shown to be a two layered t w o dimensional manifold in the three dimensional species space. Sustained aperiodic spatio-temporal solutions are also f ound . B y ...

Data Types and Software Validation John V. Guttag, Ellis Horowitz, and David R. Musser University of Southern California A data abstraction can be naturally specified using algebraic axioms. The virtue of these axioms is that they permit a representation-independent formal specification of a data type. An example is given which shows how to employ algebraic axioms at successive levels of implem...