Oncologist and CDC Alert: The Nighttime Habit Weakening Your Immune System

MEXICO CITY (apro).— An oncological surgeon with 22 years of experience has raised concerns about a common lifestyle habit—sleep deprivation due to screen usage and nighttime activities—and its detrimental effects on key immune system mechanisms. This warning aligns with findings from the Centers for Disease Control and Prevention (CDC) in the United States, Mayo Clinic, American Cancer Society, National Cancer Institute, and international cancer research organizations.

Dr. Tarang Krishna, in a recent publication, highlighted that disrupted sleep and insufficient rest hinder the body’s ability to complete essential processes needed to maintain a stable immune response. He noted that prolonged nighttime phone use and digital content consumption delay bedtime and diminish the production of night-time hormones critical for biological regulation.

Key points raised by Dr. Krishna include:

• Sleep serves as a period for the immune system to reorganize functions.
• Disrupted rest alters melatonin release.
• Extended wakefulness impairs the body’s ability to combat common infections.
• Poor sleep is linked to metabolic disturbances documented in recent studies.

CDC Reports Reduced Antibody Production in Sleep-Restricted Individuals

For years, the CDC has documented the immunological effects of sleep deprivation. The agency reported a study where adults restricted to only four hours of sleep per night over six days exhibited more than a 50% reduction in antibody production following an influenza vaccine compared to regularly sleeping individuals.

Additional Findings from CDC Analyses:

• Chronic sleep deprivation disrupts the activity of immune cells such as NK (natural killer) cells.
• Sleeping less than the recommended seven hours increases the frequency of respiratory infections.
• Sleep loss is associated with cardiovascular disease and type 2 diabetes, conditions linked to inflammation.
• The CDC advises maintaining consistent sleep schedules and avoiding screens before bedtime.

The CDC’s cancer survivor guidelines also emphasize sleep as a general measure to maintain immune function, noting that sleep helps “refresh, replenish, and rebuild” physiological processes directly influencing immune defenses.

Mayo Clinic Links Insomnia with Higher Disease Risk

The Mayo Clinic, in its frequently asked questions section, reports that individuals with insufficient sleep are more likely to fall ill after being exposed to common viruses. It also notes that recovery from an infection can be prolonged in those suffering from insomnia or fragmented sleep.

Highlights from the institution include:

• Lack of sleep affects the effectiveness of the innate immune response.
• Sleeping less than recommended disrupts cytokine balance, molecules that regulate inflammation.
• Reduced night-time sleep is linked with increased incidence of flu and the common cold.
• Experts recommend limiting the use of electronic devices in the hour before bedtime.

A December 2024 report from the same institution adds that night-time rest plays a crucial role in the body’s ability to combat infections and sustain metabolic functions.

International Institutes Study Sleep, Immunity, and Cancer Risk

The National Cancer Institute of the United States included a section on sleep health in its trend report. The document states that sleep duration, quality, and regularity are linked to mortality and the risk of various non-communicable diseases, including those associated with immune processes.

The report highlights:

• Inadequate sleep disrupts DNA repair.
• Interruption of circadian rhythms affects stress response.
• Chronic inflammation from sleep deprivation may influence carcinogenesis processes.
• Research continues to explore the extent of the risk.

The International Agency for Research on Cancer has classified night-time work that disrupts circadian rhythms as “probably carcinogenic” since 2019, based on evidence from animal models and observational studies. This classification relates to alterations in the sleep-wake cycle, a process linked with immune system activity.

Recent academic reviews have described an interaction between sleep, immunity, and tumor risk. Experimental studies conducted in 2025 found that a single night of total sleep deprivation altered the immunological cell profiles in healthy young adults, making them similar to those seen in people with chronic inflammation.

Consistent Recommendations Across Health and Research Organizations

The most common recommendations across consulted institutions include:

Maintaining a fixed schedule for going to bed and waking up.

Avoiding the use of electronic devices before sleep.

Limiting caffeine intake in the afternoon and evening.

Creating a dark, quiet, and stimulus-free bedroom environment.

Consulting professionals if insufficient sleep persists.

Organizations agree that adequate rest supports the body’s immune response and ability to combat infections, though they note that research on the direct relationship between sleep and cancer continues to evolve.