Beach sediments of Kanyakumari at the southernmost India were evaluated for metals and trace elements and to assess their possible impact on coastal ecosystems. Positive correlations (except for Cd and Sr) between them indicated metamorphic lithologies and heavy mineral deposits as possible sources. Significant-extremely high enrichment and very high contamination of Th, Zr, Mo, Ti and U reflected the presence of different heavy minerals. The geo-accumulation index, however, mirrored their variable abundances at different sites. Association of Cd with P suggested the influence of anthropogenic solid waste from fishing industry. It might have caused >41-fold enrichment of Cd and the Fe- Mn-oxides possibly acted as scavengers for 13-fold enrichment of As compared to UCC. Concentrations of Zn and Cr between ERL and ERM in 13% and 93% of the samples, and Ni > ERM in 87% of sediments suggest their bioavailability to seawater with a potential risk for coastal aquifers.
COVID-19 is a terrible pandemic sweeping the whole world with more than 600 million confirmed cases and 6 million recorded deaths. Vaccination was identified as the sole option that could help in combatting the disease. In this study, SARS-CoV-2 antibodies were assessed in the saliva of vaccinated participants (Covaxin and Covishield) through enzyme-linked sorbent assay (ELISA). The IgG antibody titres in females were significantly greater than those of males. The total antibody titres of vaccinated individuals were greater than those of unvaccinated participants, although not statistically significant. Individuals who had completed both doses of vaccination had higher antibody levels than those who had received a single dose. People who had experienced COVID-19 after vaccination had better immunity compared to those who were unvaccinated with COVID-19 history. Thus, SARS-CoV-2 spike-specific antibodies were successfully demonstrated in saliva samples, and knowledge about the immunity triggered by the vaccines can assist in making informed choices.