South Asia Investor Review

How widespread are coronavirus infections and vaccinations in Pakistan? Has Pakistan achieved herd immunity or close to achieving it?  The latest IHME (Institute for Health Metrics and Evaluation) report on Pakistan (dated August 19, 2021) claims that "about 81% of the population have been infected, and about 65% are immune to the Delta variant". It says that the "cases and deaths are declining in Pakistan, but the situation remains fragile".       The report defines two types of coronavirus variants: escape and non-escape. The escape variants include Beta (B.1.351), Gamma (P.1) and Delta (India) variants while non-escape variants are the original ancestral virus and Alpha (UK) variant.  The report projects Pakistan reaching 75% to 90% immunity to various COVID19 variants through a combination of infections and vaccinations by the end of 2021.  Immunity to COVID Variants in Pakistan. Source: IHME The  IHME August 19 COVID19  results briefing ...

Antibodies testing of 7,000 adults in Karachi reveals that as many as 15% of them have already been exposed to  COVID19  without experiencing symptoms, according to a study by Dr. Wajiha Javed, an epidemiologist and head of public health and research at Getz Pharma in Pakistan. This data raises the possibility that millions of Pakistanis may have already been exposed to coronavirus. It takes at least 40% of the population to be exposed to build herd immunity. This may be the only way to normalcy unless there is a vaccine available sooner. Human Immune Response: Human body naturally produces antibodies to fight viruses of various kinds, including the coronavirus. Presence of antibodies in a person confirms that he or she has been exposed to a virus regardless of symptoms. Serology tests can detect body's immune response to even a low-level viral load. Such an immune response also occurs to a  vaccine  which does not make you sick but helps build immunity. More low...