Diseases, Conditions, Syndromes

Chinese coronavirus vaccine approved for military use

China's military has approved a coronavirus vaccine for use within its ranks that has been developed by its research unit and a biotech firm, the company said Monday.

Diseases, Conditions, Syndromes

Fall in new cases raises hope in virus outbreak in China

The number of new cases of the coronavirus in China dropped for a second straight day, health officials said Wednesday in a possible glimmer of hope amid the outbreak that has infected over 45,000 people worldwide and killed ...

Diseases, Conditions, Syndromes

Companies look into possible vaccines for China virus

Clinical trials for a vaccine against the new virus sweeping China could be carried out in the summer, the head of an anti-epidemic coalition said on Thursday, as different companies announced research into the disease.

Biomedical technology

Embattled Philips says respirators 'within safety limits'

Under-fire Dutch medical device maker Philips said Wednesday extensive testing on its recalled respirator devices showed they were "within safety limits" for use, but that a final verdict rests with global regulatory authorities.

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Stock exchange

A stock exchange, (formerly a securities exchange) is a corporation or mutual organization which provides "trading" facilities for stock brokers and traders, to trade stocks and other securities. Stock exchanges also provide facilities for the issue and redemption of securities as well as other financial instruments and capital events including the payment of income and dividends. The securities traded on a stock exchange include: shares issued by companies, unit trusts, derivatives, pooled investment products and bonds. To be able to trade a security on a certain stock exchange, it has to be listed there. Usually there is a central location at least for recordkeeping, but trade is less and less linked to such a physical place, as modern markets are electronic networks, which gives them advantages of speed and cost of transactions. Trade on an exchange is by members only. The initial offering of stocks and bonds to investors is by definition done in the primary market and subsequent trading is done in the secondary market. A stock exchange is often the most important component of a stock market. Supply and demand in stock markets is driven by various factors which, as in all free markets, affect the price of stocks (see stock valuation).

There is usually no compulsion to issue stock via the stock exchange itself, nor must stock be subsequently traded on the exchange. Such trading is said to be off exchange or over-the-counter. This is the usual way that derivatives and bonds are traded. Increasingly, stock exchanges are part of a global market for securities.

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