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Innate lymphoid cells help control skin bacteria by regulating sebaceous glands.

Certain bacteria and fungi are linked to healthy scalps and dandruff, suggesting that the scalp's microbial balance affects its health.

Acne is a temporary skin imbalance during puberty that often resolves on its own.

The skin microbiome helps heal wounds and can be targeted to improve healing.

Hydra can help understand human hair follicle microbiomes and develop new skin disease therapies.

Sex hormones may affect COVID-19 severity, with estrogen possibly reducing risk and testosterone potentially increasing it.

The scalp's microorganisms significantly affect hair health and disease.

Hair follicle development and microbes help regulatory T cells gather in newborn skin.

The study developed a tool to predict how gut microbes process foods and drugs, showing that similar compounds often share metabolic pathways and effects.

The conclusion is that certain genetic factors and blood types may affect COVID-19 severity, but changes in ACE2 and TMPRSS2 genes are not clearly linked to it.

Men generally have more severe COVID-19 cases and higher death rates than women due to biological differences.

Different types of stem cells exist within individual skin layers, and they can adapt to damage, transplantation, or tumor growth. These cells are regulated by their environment and genetic factors. Tumor growth is driven by expanding, genetically altered cells, not long-lived mutant stem cells. There's evidence of cancer stem cells in skin tumors. Other cells, bacteria, and genetic factors help maintain balance and contribute to disease progression. A method for growing mini organs from single cells has been developed.

Some viruses can cause cancer by changing cell processes and avoiding the immune system; vaccines and targeted treatments help reduce these cancers.

The document concludes that the skin's immune system is complex, involving interactions with hair follicles, nerves, and microbes, and can protect or cause disease, offering targets for new treatments.

Type 3 Innate Lymphoid Cells help maintain skin health and balance, and are involved in skin diseases and healing.

Regulatory T cells help heal skin and grow hair, and their absence can lead to healing issues and hair loss.

T-regulatory cells are important for skin health and can affect hair growth and reduce skin inflammation.

Skin bacteria, specifically Staphylococcus aureus, help in wound healing and hair growth by using IL-1β signaling. Using antibiotics on skin wounds can slow down this natural healing process.

Restoring hair bulb immune privilege is crucial for managing alopecia areata.

An imbalanced gut and lack of biotin can cause hair loss in mice.

Changes in skin microbes play a role in some skin diseases and could lead to new treatments.

Special immune cells called Regulatory T cells help control skin inflammation and repair in various skin diseases.

Lipopolysaccharides boost wheat seedling growth, but procyanidin B2 weakens this effect.

Obesity is linked to many gastrointestinal diseases and needs more research for treatment development.

Skin's Regulatory T cells are crucial for maintaining skin health and could be targeted to treat immune-related skin diseases and cancer.

Short-chain fatty acids from *Cutibacterium acnes* cause skin inflammation, contributing to acne.

HPV16 oncogenes disrupt the normal activity of hair follicle stem cells.

Alopecia areata may be linked to imbalanced gut bacteria.

Men are more likely to have severe respiratory viral infections like COVID-19 due to hormonal and genetic differences, while women generally have stronger immune responses.

New technologies help us better understand how skin microbes affect skin diseases.