1907 – The worst night of the Brown Dog riots in London

10 December

The Brown Dog affair was a political controversy about vivisection* that raged in England from 1903 until 1910. It involved the infiltration by Swedish feminists of University of London medical lectures, pitched battles between medical students and the police, police protection for the statue of a dog, a libel trial at the Royal Courts of Justice, and the establishment of a Royal Commission to investigate the use of animals in experiments. The affair became a cause célèbre that divided the country.

The controversy was triggered by allegations that, in February 1903, William Bayliss of the Department of Physiology at University College London performed an illegal dissection, before an audience of 60 medical students, on a brown terrier dog – adequately anaesthetized, according to Bayliss and his team; conscious and struggling, according to the Swedish activists. The procedure was condemned as cruel and unlawful by the National Anti-Vivisection Society. Bayliss, whose research on dogs led to the discovery of hormones, was outraged by the assault on his reputation. He sued for libel and won.

Anti-vivisectionists commissioned a bronze statue of the dog as a memorial, unveiled in Battersea in 1906, but medical students were angered by its provocative plaque – "Men and women of England, how long shall these Things be?" – leading to frequent vandalism of the memorial and the need for a 24-hour police guard against the so-called anti-doggers. On 10 December 1907 1,000 medical students marched through central London waving effigies of the brown dog on sticks, clashing with suffragettes, trade unionists and 400 police officers, one of a series of battles known as the Brown Dog riots.

In March 1910, tired of the controversy, Battersea Council sent four workers accompanied by 120 police officers to remove the statue under cover of darkness, after which it was reportedly melted down by the council's blacksmith, despite a 20,000-strong petition in its favour. A new statue of the brown dog was commissioned by anti-vivisection groups over 70 years later, and was erected in Battersea Park in 1985. Peter Mason wrote in 1997 that all that was left of the old statue was a hump in the pavement, the sign on a nearby fence reading "No Dogs."

* Vivisection (from Latin vivus, meaning "alive", and sectio, meaning "cutting") is surgery conducted for experimental purposes on a living organism, typically animals with a central nervous system, to view living internal structure.

1979 – The eradication of the smallpox virus is certified

9 December

Smallpox was an infectious disease caused by either of two virus variants, Variola major and Variola minor. The disease was originally known in English as the "pox" or "red plague"; the term "smallpox" was first used in Britain in the 15th century to distinguish variola from the "great pox" (syphilis). The last naturally occurring case of smallpox (Variola minor) was diagnosed on 26 October 1977.

Infection with smallpox is focused in small blood vessels of the skin and in the mouth and throat before disseminating. In the skin it results in a characteristic maculopapular rash and, later, raised fluid-filled blisters. V. major produced a more serious disease and had an overall mortality rate of 30–35 percent. V. minor caused a milder form of disease (also known as alastrim, cottonpox, milkpox, whitepox, and Cuban itch) which killed about 1 percent of its victims. Long-term complications of V. major infection included characteristic scars, commonly on the face, which occur in 65–85 percent of survivors. Blindness resulting from corneal ulceration and scarring, and limb deformities due to arthritis and osteomyelitis were less common complications, seen in about 2–5 percent of cases.

Smallpox is believed to have emerged in human populations about 10,000 BC. The earliest physical evidence of it is probably the pustular rash on the mummified body of Pharaoh Ramses V of Egypt. The disease killed an estimated 400,000 Europeans annually during the closing years of the 18th century (including five reigning monarchs), and was responsible for a third of all blindness. Of all those infected, 20–60 percent—and over 80 percent of infected children—died from the disease. Smallpox was responsible for an estimated 300–500 million deaths during the 20th century. As recently as 1967, the World Health Organization (WHO) estimated that 15 million people contracted the disease and that two million died in that year.

After vaccination campaigns throughout the 19th and 20th centuries, the WHO certified the global eradication of smallpox in 1979. Smallpox is one of two infectious diseases to have been eradicated, the other being rinderpest (a disease of cattle and related animals), which was declared eradicated in 2011.