Caveats on COVID-19 herd immunity threshold: the Spain case

After a year of living with the COVID-19 pandemic and its associated consequences, hope looms on the horizon thanks to vaccines. The question is what percentage of the population needs to be immune to reach herd immunity, that is to avoid future outbreaks. The answer depends on the basic reproductive number, R0, a key epidemiological parameter measuring the transmission capacity of a disease. In addition to the virus itself, R0 also depends on the characteristics of the population and their environment. Additionally, the estimate of R0 depends on the methodology used, the accuracy of data and the generation time distribution. This study aims to reflect on the difficulties surrounding R0 estimation, and provides Spain with a threshold for herd immunity, for which we considered the different combinations of all the factors that affect the R0 of the Spanish population. Estimates of R0 range from 1.39 to 3.10 for the ancestral SARS-CoV-2 variant, with the largest differences produced by the method chosen to estimate R0. With these values, the herd immunity threshold (HIT) ranges from 28.1 to 67.7%, which would have made 70% a realistic upper bound for Spain. However, the imposition of the delta variant (B.1.617.2 lineage) in late summer 2021 may have expanded the range of R0 to 4.02–8.96 and pushed the upper bound of the HIT to 90%.

Fear and Attitude towards SARS-CoV-2 (COVID-19) Infection in Spanish Population during the Period of Confinement

In January 2020, the WHO classified SARS-CoV-2 infection as a public health emergency and it was declared a pandemic on 11 March 2020. The media warned about the danger of infection, fuelling the population’s fear of the new situation and increasing the perception of risk. This fear can cause behaviour that will determine the course of the pandemic and, therefore, the purpose of this study was to analyse the fear of infection from COVID-19 among the Spanish population during the state of emergency. A cross-sectional, descriptive observational study was conducted with 16,372 participants. Data on sociodemographic factors, health factors, risk perception and fear were collected through an online survey. Level of fear is associated with older age, a lower level of education, having a person infected with SARS-CoV-2 in the immediate surroundings and living with and belonging to the most socioeconomically vulnerable group of people. Risk perception is associated with increased preventive behaviour. This paper provides relevant information for the public health sector since it contributes first-hand knowledge of population data that is highly useful in terms of prevention. Understanding the experiences of people in this pandemic helps to create more effective future intervention strategies in terms of planning and management for crisis situations.

„Potem przemówił komendant Brygady naszej tow. Hiszpan w języku niemieckim i tow. kapt. tłumaczył”

And Then the Commander of Our Brigade, Comrade Spanish, talked in German and Comrade Captain Interpreted. Interpretation in the International Brigades during the Civil War in Spain 1936-1939 The aim of the present article is to describe multilingual interactions at the XIII Jarosław Dąbrowski International Brigade between volunteers of different nationalities, mainly Poles, and the Spanish population as narrated by Boruch Nysembaum, a communist from Warsaw and a participant of the Spanish Civil War. At the same time, it is the first presentation of onthe- spot memoirs written by a volunteer who did not return from this war. On the basis of his narrative, the article tries to answer the questions concerning the way volunteers, who lacked adequate foreign language skills, communicated with the Spanish population and with other volunteers, the forms of their communications, and finally, the specific characteristics of this multilingual communication.

Evolution of Nutritional Habits Behaviour of Spanish Population Confined Through Social Media

Introduction: In Spain, on 14 March 2020, a state of alarm is declared to face the health emergency situation caused by the COVID-19 coronavirus, limiting the freedom of movement of people. The Spanish population is confined.Objective: With this situation, “NUTRITIONAL HEALTH IS NOT CONFINED” arises a research project that seeks to promote nutritional education based on the pattern of the Mediterranean diet (MD) using new computer technologies. It is about providing the population with the information of general interest about the promotion of a healthy diet through social networks and analysing the impact of its dissemination, in the form of a longitudinal intervention study of the Spanish nutritional evolution during confinement, with a daily survey format, and it is intended to assess food consumption during the period of confinement. Materials and methods: In total, 936 participants were asked every day. Short publications were published every day based on the scientific evidence (FAO, WHO, AECOSAN) through social media such as Instagram, accompanied by a questionnaire of 11 questions (yes/no) where it was intended to assess the evolution of daily consumption.Results and Discussion: The diffusion through social media has allowed to have a greater reach of the population. We observed that mood throughout confinement generally improves. There are certain eating habits from the MD that are well established in the daily diet of our population, such as the consumption of fruits, vegetables, legumes, dairy products, and eggs. It seems that enjoying good health is a growing concern in pandemic situations, which is why inappropriate behaviours such as “snacking” between meals or the consumption of processed foods such as snacks, industrial pastries, soft drinks, and sweets are avoided, increasing the amount of healthy food such as meat and fish. This study opens up future avenues of research promoting MD and implements new cohort nutritional databases, especially about young adult people, who are adept at navigating digital spaces and therefore using social media.

Validation of the Acceptance and Action Questionnaire-II in the general Spanish population

Acceptance and Commitment Therapy states that Experiential Avoidance contributes to the development of psychological issues. The Acceptance and Action Questionnaire-II measures Experiential Avoidance. The objective of the current study is to perform a validation of the Acceptance and Action Questionnaire-II in the general Spanish population. A sample of 964 participants from all over Spain was used (M = 43.43 years; SD = 15.27). The psychometric properties of the questionnaire were examined according to Classical Test Theory. In addition, assessments were made of participants’ personality, Emotional Intelligence, Anxiety, and Depression, and the influence of sex and age on Experiential Avoidance was examined. The Acceptance and Action Questionnaire-II is a unidimensional instrument, with excellent reliability (α = .93) and adequate evidence of validity. Differences were observed based on sex, with women scoring higher, and based on age, with lower scores in the older age groups. The Acceptance and Action Questionnaire-II is a valid, reliable instrument for use in the general Spanish population.

Loneliness, mental health and COVID-19 in the Spanish population

The study aim was to assess the effects of the health emergency and the stay-at-home restrictions on loneliness variables in the Spanish population during the initial stage of COVID-19. A cross-sectional study was conducted through an online survey of 3480 people. From March 14, 2020, screening tests were used to evaluate sociodemographic and COVID-19-related data on loneliness, social support, the presence of mental health symptoms, discrimination, and spiritual well-being. Descriptive analyses were conducted and linear regression models were constructed. A negative association was found between loneliness and being older, being partnered, having children, being a university graduate, being retired or still working, having stronger religious beliefs, believing that information provided about the pandemic was adequate, having social support, and having self-compassion. Actions that promote social support and further studies on loneliness in groups of older people are needed to prevent the pandemic having a stronger impact on mental health and well-being.