infectious diseases

From 1 January to 23 February 2025, more than half as many cases of measles had already been reported in Spain as in the previous year. To analyse the causes of this spike, assess the seriousness of the situation and the measures to be taken, the Science Media Centre Spain organised a briefing with Noemí López Perea, researcher at the National Epidemiology Centre (CNE-ISCIII), Fernando Moraga-Llop, paediatrician, spokesperson and senior member of the Spanish Vaccinology Association (AEV), and María del Mar Tomás, spokesperson of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC).

In the context of World AIDS Day, which is celebrated on 1 December, it is essential to reflect on one of the most urgent challenges in the fight against this disease: HIV in the paediatric population. A project led by the Complutense University of Madrid seeks to reduce paediatric mortality by training research leaders in sub-Saharan Africa and applying technology and innovation.

In Rwanda, according to the latest ECDC data, 25 cases and 11 deaths have been detected in what is already the third largest outbreak of the Marburg virus to date. The WHO considers the overall risk to be low and possible imported cases from Belgium and Germany - reported only yesterday in Hamburg - have proved to be false alarms. What is of concern is the national and regional spread of a virus for which mortality can be as high as 88% and for which there is no treatment or vaccine. In this article we answer the main questions.

The sperm of men infected with high-risk genotypes of the human papillomavirus (HPV) suffers more damage from oxidative stress and has a weaker immune response, which can lead to reduced fertility. This is one of the conclusions of a study published in the journal Frontiers in Cellular and Infection Microbiology. The research compared the semen of 20 adults infected with high-risk genotypes, seven infected with low-risk genotypes, and 43 adults without infections.

The third part of the National Plan for Surveillance and Control of Vector-borne Diseases is presented today, focusing on ticks, parasitic mites that cause serious diseases. Of these, the two of greatest concern in Spain are Lyme disease and Crimean-Congo haemorrhagic fever. Cases are expected to increase, but so far there has been no surveillance. International health authorities have also warned of the risks of Lyme disease in connection with the European Football Championship being held in Germany in recent weeks. 

Toledo and Alicante are suffering the first outbreaks of measles recorded in Spain since the pandemic, El País reported today. In total, 15 cases have been confirmed since 1 January, of which seven are imported and eight autochthonous.

Since mid-October, northern China has reported an increase in influenza-like illness compared to the same period in the previous three years. On 21 November, the media and the ProMED system reported outbreaks of pneumonia of undiagnosed cause in children in northern China. According to the World Health Organization (WHO), it is unclear whether these are related to the overall increase in respiratory infections previously reported by the Chinese authorities or are separate episodes. In a statement, the WHO has officially requested detailed information from China on this increase in respiratory illnesses and outbreaks of childhood pneumonia.

The prions have made headlines after El País reported that a researcher working with them at a Catalan research center died in 2022 with symptoms compatible with Creutzfeldt-Jakob disease, a type of prion disease.

Nearly half of the world's population is at risk from dengue fever. Diagnosed cases have increased eightfold in the last decade, a rise fuelled by global warming. August 26 marks the International Day against this disease endemic in more than 100 tropical and subtropical countries, which is beginning to affect new areas, including Europe.

Today it is difficult to see science policies that do not mention citizen science or citizen participation in science. On World Mosquito Day, which is celebrated on August 20, we analyze what has been achieved by the Mosquito Alert project, based on citizen science and which the Ministry of Health has supported this summer within the framework of the National Plan for Disease Prevention, Surveillance and Control Transmitted by Vectors.