Quantifying neutralising antibody responses against SARS-CoV-2 in dried blood spots (DBS) and paired sera

The ongoing SARS-CoV-2 pandemic was initially managed by non-pharmaceutical interventions such as diagnostic testing, isolation of positive cases, physical distancing and lockdowns. The advent of vaccines has provided crucial protection against SARS-CoV-2. Neutralising antibody (nAb) responses are a key correlate of protection, and therefore measuring nAb responses is essential for monitoring vaccine efficacy. Fingerstick dried blood spots (DBS) are ideal for use in large-scale sero-surveillance because they are inexpensive, offer the option of self-collection and can be transported and stored at ambient temperatures. Such advantages also make DBS appealing to use in resource-limited settings and in potential future pandemics. In this study, nAb responses in sera, venous blood and fingerstick blood stored on filter paper were measured. Samples were collected from SARS-CoV-2 acutely infected individuals, SARS-CoV-2 convalescent individuals and SARS-CoV-2 vaccinated individuals. Good agreement was observed between the nAb responses measured in eluted DBS and paired sera. Stability of nAb responses was also observed in sera stored on filter paper at room temperature for 28 days. Overall, this study provides support for the use of filter paper as a viable sample collection method to study nAb responses.</p

Beneficial effects of pasta during pregnancy: The positive effects of mediterranean diet

Pregnancy is a physiological state during which the woman's body undergoes profound modifications. During this time, every woman must be nourished in such a way as to maintain herself in good health and at the same time allow the fetal tissues to form and develop in the best way. Proper nutrition is one of the fundamental prerequisites for the normal evolution of both pregnancy and fetal growth: the quantity and quality of food and drinks must be scrupulously controlled. Contrariwise, it is important to avoid the excess calories and macronutrients. In fact, during pregnancy, it may be just as harmful as their shortage, especially in overweight and obese women, for which the risk of miscarriage, gestational diabetes, fetal growth disorders and preeclampsia increases. The pasta constitutes the foundation of the Mediterranean diet food. The dough can be seen, therefore, so it represents an excellent ally of the diet from a nutritional point of view. The nutritional values of the pasta change depending on the type, based on the fact that the dough is traditional or integral semolina. It also contains Vitamin B and has an abundance of minerals, among which potassium. The pasta is an easily digestible food, ensuring energy ready to use (such as all carbohydrates); moreover, it possesses a great satiating power. In case of overweight, however, it is possible to reduce the number of carbohydrates in the diet, taking care not to make them ever miss. In conclusion, the consumption of pasta is very important during pregnancy: a diet without carbohydrates can be dangerous for all physiological pathways

Investigations of low-frequency noise of GaN based heterostructure field-effect transistors

NRC publication: Ye