This does not include zombie infections, meaning the true death toll would be even higher. With a world population of 36+ billion, the number of deaths within one week from non-zombie-related causes is estimated as follows:
Direct Causes (Due to Lack of Medical Care & Societal Collapse)
Natural deaths (normal mortality rate): ~2.34 million
Deaths from societal collapse (lack of medical care, starvation, stress): ~11.69 million
Asthma-related deaths (without medication or inhalers): ~14.4 million
Cancer patients (without treatment): ~8 million
Paralysed/immobile individuals (without care): ~9.6 million
Total Non-Zombie Deaths: ~43.69 million
Indirect Causes (Due to Collapse & Chaos)
Suicides (despair, hopelessness): ~8 million
Accidents (fires, infrastructure collapse, vehicle crashes): ~8 million
Exposure (lack of shelter, dehydration, extreme weather): ~16 million
Violence (riots, looting, killings in panic): ~32 million
Total Indirect Deaths: ~64 million
Grand Total (Non-Zombie + Indirect Causes): ~107.69 million deaths in the first week