Health
Five Years On: COVID-19 Pandemic Leaves Lingering Mysteries and Challenges
More than five years after the first cluster of COVID-19 cases emerged in Wuhan, China, the virus continues to evolve, leaving behind unanswered questions and a legacy of global disruption. The pandemic reshaped public health policies, exposed systemic inequities, and brought groundbreaking advances in vaccine development.
Origins of the Virus Remain Unclear
The origins of SARS-CoV-2, the virus causing COVID-19, remain uncertain. While scientists believe it likely originated in bats and was transmitted to humans through an intermediary species such as raccoon dogs or civet cats, this theory remains unproven. Speculation about a potential laboratory leak in Wuhan has further fueled political tensions.
The World Health Organization (WHO) recently urged China to share more data, calling transparency a “moral and scientific imperative” to help prevent future pandemics. However, experts caution that the true origin may never be definitively established.
Global Death Toll and Vaccination Efforts
The pandemic’s death toll remains staggering. While the WHO reports over seven million deaths worldwide, the actual number is estimated to exceed 20 million. Vulnerable populations, especially older adults, continue to account for a significant proportion of fatalities.
Despite these losses, the rapid development of COVID-19 vaccines has saved tens of millions of lives. The introduction of mRNA vaccines by Pfizer and Moderna in less than a year marked a scientific milestone, with more than 13 billion doses administered globally since 2021.
Vaccines have proven effective in reducing severe illness, hospitalizations, and deaths, though their protection against mild infections wanes over time. Researchers are working on next-generation vaccines, including nasal options, to better prevent infections.
Variants and Virus Evolution
The virus has continually mutated, with the omicron variant and its subvariants dominating since late 2021. Currently, KP.3 and a hybrid strain, XEC, are the primary variants in Europe. While these variants remain highly transmissible, existing vaccines and treatments have shown efficacy against them.
Long COVID: A Lingering Concern
Millions globally continue to grapple with long COVID, a condition characterized by persistent symptoms such as fatigue, brain fog, and cardiovascular issues. While vaccination reduces the risk, the root cause of long COVID remains unclear, complicating efforts to develop effective treatments.
Emerging research suggests remnants of the virus may linger in some patients’ bodies, offering clues but no definitive answers.
Looking Ahead
As humanity adjusts to a world where COVID-19 is no longer a leading cause of death but still a public health concern, the focus remains on monitoring variants, improving treatments, and addressing the long-term effects of the virus.
“The virus is still with us,” said WHO Director-General Tedros Adhanom Ghebreyesus. “We cannot talk about COVID in the past.”
Health
Global Mental Health Cases Near 1.2 Billion as Anxiety and Depression Drive Sharp Worldwide Rise
A major global analysis has found that mental health conditions have surged to an estimated 1.2 billion people worldwide, driven largely by steep increases in anxiety and depression over the past three decades.
The findings, published in The Lancet as part of the Global Burden of Disease Study 2023, show that the number of people living with mental disorders has almost doubled since 1990, marking a 95% rise. Researchers say major depressive disorder and anxiety disorders have seen even sharper growth, increasing by 131% and 158% respectively, making them the most prevalent mental health conditions globally.
The report describes mental illnesses as widespread conditions that create long-term disability and significant human suffering. It also highlights broader consequences for economies and public services, including reduced productivity, lower workforce participation and increasing pressure on health and welfare systems.
Researchers estimate that in 2023 alone, around 620 million females and 552 million males were affected by mental health conditions. While the overall burden is rising across both sexes, the study points to notable differences in the types and prevalence of disorders.
Among women, depression and anxiety were the most commonly reported conditions, alongside higher rates of eating disorders such as anorexia nervosa and bulimia nervosa. The report links this disparity to a mix of biological, social and structural factors, including exposure to domestic violence, sexual abuse, gender inequality and reproductive health-related changes.
In contrast, neurodevelopmental and behavioural disorders, including attention deficit hyperactivity disorder (ADHD), conduct disorder and autism spectrum conditions, were more frequently diagnosed in men.
Teenagers aged 15 to 19 were identified as the group experiencing the highest mental health burden globally, raising concerns about early onset of conditions and insufficient preventive care for young people.
The study identifies several key risk factors associated with mental illness, including childhood sexual violence, bullying and intimate partner violence. These factors are strongly linked to conditions such as depression, schizophrenia, bipolar disorder and anxiety disorders. However, researchers note that such exposures have remained relatively stable over time and account for only a portion of the overall rise.
According to the authors, broader drivers are likely contributing to the increasing prevalence of mental disorders. These include genetic and biological influences, poverty, inequality, and the growing impact of global crises such as armed conflict, pandemics, natural disasters and climate-related stress.
While mental health conditions have long been a leading cause of disability worldwide, the report warns that the situation is worsening. At the same time, health systems have not expanded services at a pace matching demand.
The authors caution that the gap between rising need and limited access to care is becoming more pronounced, leaving millions without adequate treatment or support.
Health
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Health
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