2 documents found, page 1 of 1
The impact of vaccination on transmission and death by COVID-19: an observation...
Tedim, Sofia; Pinho-Bandeira, Tiago; Leitão, Rui Pedro; Silva, Cristiana; Pinheiro, Sofia J; Afreixo, Vera; Oliveira, AnaVaccines are a key tool to manage the COVID-19 pandemic by preventing infection, hospitalization, severe disease, or death. In Portugal, information on vaccine effectiveness in real-life settings is still limited. Therefore, the main goal of this study is to evaluate the association between vaccination against COVID-19 and mortality and transmissibility in the population of the biggest Primary Care Cluster in P...
The H-join of arbitrary families of graphs
Cardoso, Domingos M.; Gomes, Helena; Pinheiro, Sofia JThe H-join of a family of graphs G = {G1, . . . , Gp}, also called the generalized composition, H[G1, . . . , Gp], where all graphs are undirected, simple and finite, is the graph obtained from the graph H replacing each vertex i of H by Gi and adding to the edges of all graphs in G the edges of the join Gi ∨ Gj , for every edge ij of H. Some well known graph operations are particular cases of the H-join of a f...