SARS-CoV-2 immune response and reinfection in vaccinated Maya and mestizo in Southeast of Mexico.

Immune response to pathogens, including coronaviruses, is influenced by HLA haplotypes. 1,2. Maya ethnic group is predominant in Yucatan peninsula, this Amerindian group present allele frequency  HLA-G*01:01:02, HLA-G*01:01:01, HLA-G*01:04:01, HLA-A*68  not found in another Amerindians.

Seroprevalence of SARS-CoV-2 antibodies in blood donors during the third wave of infection in Campeche Mexico.

At the end of 2020 and previous to the second wave of COVID-19 in Mexico, the seroprevalence in unvaccinated people in the state of Campeche, Mexico was below 15 %. The prevalence changes with ongoing pandemic and per geographical areas. Blood donors screening is a powerful and cost-effective alternative to monitor the population's infection exposure.

Mexican Trypanosoma cruzi isolates: in vitro susceptibility of epimastigotes to anti-trypanosoma cruzi drugs and metacyclic forms to complement-mediated lysis.

Trypanosoma cruzi has a clonal organization with an ample array of genetic and phenotypic features and probably anaploid constitution. Consequently, the biological behavior, biochemistry, and molecular attributes may be distinctive for each parasite strain in different geographical regions. As far as we know, there is no published information on the susceptibility of Mexican T.