The study finds that even decades after cancer, survivors remain particularly vulnerable to severe Covid-19s, urging the health authorities to review customized protection strategies in future pandemics.
Study: The infection and severity of Covid-19 among the surviving cancer of the child in Denmark and Sweden: A co-study based on the registration of the population matching and brothers comparisons. Credit Picture: Stock Frame/Shutterstock.com
Survivors of the child’s cancer have a significantly higher risk of developing severe crowning disease 2019 (COVID-19) even many years after cancer diagnosis, as reported by the first study based on the European and national population published in Lancet’s regional health.
Background
The prevalence of child cancer is rapidly increasing worldwide, with more than 400,000 children aged 0-19 with cancer each year. Recent developments in diagnostics and therapeutic care have significantly improved cancer prognosis, leading to a survival rate of over 85% in high -income countries.
With increasing survival rates, the number of survivors of the child’s cancer is steadily increasing worldwide. However, the risk of various health complications and premature mortality is significantly higher in this vulnerable population. During the Covid-19 pandemic, a significantly higher risk of severe Covid-19 and relative mortality between people with a history of cancer was observed.
The data on the impact of the Covid-19 pandemic on the survivors of the child’s cancer remain unclear. Only a few studies have been conducted on child cancer survivors, focusing mainly on psychological results and lifestyle results.
The current study aimed to investigate whether survivors of the child’s cancer are at a higher risk of developing serious COVID-19 and contracts for serious acute respiratory syndrome (SARS-COV-2) compared to the general population.
The study
The study included a total of 13,659 survivors of cancer from Denmark and Sweden diagnosed with cancer before the age of 19. The risk of SARS-COV-2 infection and severe Covid -9 in the survivors of the child’s cancer was compared to 58,803 randomly selected people from the general population, which match the time of birth, sex and country.
Danger comparisons were also carried out between survivors of cancer and their brothers to take into account the confuse family factors. All participants were followed from January 2020 to December 2022.
Denmark and Sweden have been selected as participating countries due to significant differences in their pandemic answers. While Denmark applied compulsory restrictions throughout the pandemic, including mask wear, national level lock and school closure, Sweden followed a more permissible approach, choosing recommendations and not commands.
Basic findings
The comparison analysis between survivors of the child’s cancer and their bonds by the general population revealed a similar risk of developing serious Covid -9 at the beginning of the pandemic.
However, with the appearance of SARS-COV-2 variants with a higher postdoctoral, such as Alpha and Omicron variants, a higher risk of serious Covid-19 was observed among the survivors of cancer by their counterparts by the general population.
While survivors of the child’s cancer faced a higher risk of severe Covid-19, were less likely to contract SARS-COV-2 compared to those corresponding to the general population. The risk was more evident among comparisons during the transmission of OMICRON variant.
The comparison analysis between cancer survivors and their brothers revealed a higher risk of developing serious COVID-19 and lower risk of Sars-COV-2 infection between survivors.
The country’s special analysis revealed an initial difference in the serious risk of Covid -9 between survivors and comparisons from Denmark and Sweden. However, with the appearance of higher postdoctoral variants, a higher risk of severe Covid -9 was observed between surviving cancer from both countries than their respective comparisons. Regarding the SARS-COV-2 infection, a higher risk was observed between the comparisons by survivors in both countries.
Although the relative risk (adapted risk ratio, AHR) of the serious Covid-19 was higher in Sweden, the absolute proportion of survivors affected were shocked by both countries by the end of the study period.
Importance
The study reveals that survivors of the child’s cancer had a 58% higher risk of developing severe COVID-19 by their counterparts from the general population (AHR = 1.58) and a double risk compared to their brothers (AHR = 2.02), despite the fact that it has a lower risk of Sars-COV-2.
The risk of severe Covid-19 was particularly noticeable among survivors with a diagnosis of childhood cancer at the age of 15 years and older, survivors diagnosed with compact tumors and survivors aged 50 years or older at the beginning of the pandemic. The increased risk was more apparent during Alpha and Omicron variants.
Previous studies including high-risk populations have also described higher risk of severe COVID-19 among surviving adulthood cancer. The findings of the current study show that survivors of the child’s cancer are particularly prone to the development of severe COVID-19 during high transmission periods, suggesting that they could have benefited from classification as a high-risk population and with customized interventions, such as priority.
It is important, while the risk was higher, the absolute risk of severe Covid -9 remained low in both groups, with 0.8% of survivors and 0.4% of their comparisons diagnosed with severe Covid -9 during the study period.
Although Denmark and Sweden have applied different pandemic control measures, the study reported similar proportions of survivors of childhood cancer with severe Covid-19 in both countries during high transmission periods. The risk of severe Covid-19 remained high between survivors in both countries, even after the COVID-19 vaccine was introduced.
This could be partly due to the lowest protective efficacy of vaccines in immunosuppressed people such as patients with cancer, as well as other factors such as behavioral differences, with survivors taking greater precautions to avoid infection. Differences in test rates between countries may also have affected the observed rates of infection.
The authors of the study also note some restrictions, such as the inability to stratification by specific cancer due to limited statistical power and a possible sub -representation of the co -operation they manage in primary care.
Overall, the study provides valuable information to facilitate future pandemic preparations. The findings also emphasize the need for customized interventions to ensure high -risk populations during future health crises.
