Diseases, Conditions, Syndromes

Expert: Let's talk about social distancing

The need for social distancing will continue into the summer as an important public health tool to reduce the spread of COVID-19. Dr. Gregory Poland, an infectious diseases specialist at Mayo Clinic acknowledges the hardships ...

Diseases, Conditions, Syndromes

Q&A: COVID-19 expert explains how the virus makes people sick

Experts continue to learn more about SARS-CoV-2, the virus that causes COVID-19, and how it behaves. Dr. Gregory Poland, an infectious diseases expert and director of Mayo Clinic's Vaccine Research Group, is answering questions ...

Diseases, Conditions, Syndromes

COVID-19: An expert explains immunity and seasonality

The ongoing coronavirus pandemic has infected nearly three quarters of a million people worldwide, with more than 140,000 cases in the United States. As laboratories around the world—and here at Johns Hopkins—rush to ...

Diseases, Conditions, Syndromes

Coronavirus could become seasonal: top US scientist

There is a strong chance the new coronavirus could return in seasonal cycles, a senior US scientist said Wednesday, underscoring the urgent need to find a vaccine and effective treatments.

Diseases, Conditions, Syndromes

CDC: Seasonal influenza viruses circulating in southern hemisphere

(HealthDay)—Seasonal influenza viruses are circulating widely in the Southern Hemisphere, but influenza activity is currently low in the United States, according to research published in the Oct. 11 issue of the U.S. Centers ...

Diseases, Conditions, Syndromes

Novel schistosomiasis vaccine: New phase of clinical studies

The Oswaldo Cruz Foundation (Fiocruz) at Rio de Janeiro, Brazil, will start the phase II clinical trials of a vaccine for schistosomiasis, called 'Sm14 Vaccine'. The initiative is one of the health research and development ...

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Southern Hemisphere

Coordinates: 45°0′0″S 0°0′0″E / 45°S 0°E / -45; 0

The Southern Hemisphere is the half of a planet that is south of the equator—the word hemisphere (from the greek word σφαιρα (sphere) +ημι(half)) literally means 'half ball'. It is also that half of the celestial sphere south of the celestial equator.

Earth's southern hemisphere contains all or parts of four continents (Antarctica, Australia, parts of South America and parts of Africa), four oceans (South Atlantic, Indian, South Pacific, and Southern) and most of Oceania. Several islands off the Asian continental mainland are also in the Southern Hemisphere. Due to the tilt of Earth's rotation relative to the Sun and the ecliptic plane, summer is December 21 to March 21 and winter is June 21 to September 21. September 22 is the vernal equinox and March 21 is the autumnal equinox.

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